Include manual tax accounts in VAT evaluation

backend/db/migrations/0062_incoming_invoice_tax_override.sql

@@ -0,0 +1 @@
+ALTER TABLE "incominginvoices" ADD COLUMN "tax_amount_override" numeric(12, 2);

backend/db/migrations/0063_skr03_output_tax_account.sql

@@ -0,0 +1,20 @@
+UPDATE "accounts"
+SET "label" = 'Umsatzsteuer 19 %',
+    "description" = NULL
+WHERE "accountChart" = 'skr03'
+  AND "number" = '1776';
+--> statement-breakpoint
+INSERT INTO "accounts" ("number", "label", "description", "accountChart")
+SELECT '1776', 'Umsatzsteuer 19 %', NULL, 'skr03'
+WHERE NOT EXISTS (
+    SELECT 1
+    FROM "accounts"
+    WHERE "accountChart" = 'skr03'
+      AND "number" = '1776'
+);
+--> statement-breakpoint
+SELECT setval(
+    pg_get_serial_sequence('accounts', 'id'),
+    GREATEST(COALESCE((SELECT MAX("id") FROM "accounts"), 1), 1),
+    true
+);

backend/db/migrations/meta/_journal.json

@@ -414,6 +414,20 @@
       "when": 1786280400000,
       "tag": "0061_additional_skr03_accounts",
       "breakpoints": true
+    },
+    {
+      "idx": 59,
+      "version": "7",
+      "when": 1786284000000,
+      "tag": "0062_incoming_invoice_tax_override",
+      "breakpoints": true
+    },
+    {
+      "idx": 60,
+      "version": "7",
+      "when": 1786287600000,
+      "tag": "0063_skr03_output_tax_account",
+      "breakpoints": true
     }
   ]
 }

backend/db/schema/incominginvoices.ts

@@ -5,6 +5,7 @@ import {
     text,
     boolean,
     jsonb,
+    numeric,
     uuid,
 } from "drizzle-orm/pg-core"
 
@@ -55,6 +56,8 @@ export const incominginvoices = pgTable("incominginvoices", {
         },
     ]),
 
+    taxAmountOverride: numeric("tax_amount_override", { precision: 12, scale: 2 }),
+
     paid: boolean("paid").notNull().default(false),
     expense: boolean("expense").notNull().default(true),
 

backend/src/utils/export/datev.ts

@@ -80,18 +80,17 @@ const formatDatevDate = (date: dayjs.ConfigType, format: string) => {
     return parsed.isValid() ? parsed.tz(DATEV_TIMEZONE).format(format) : "";
 };
 
-const getIncomingInvoiceTaxReview = (account: any) => {
-    const taxRate = account.taxType === "19" ? 19 : account.taxType === "7" ? 7 : null;
-    if (taxRate === null) return null;
+const getIncomingInvoiceTaxOverride = (invoice: any) => {
+    if (invoice.taxAmountOverride === null || invoice.taxAmountOverride === undefined || invoice.taxAmountOverride === "") return null;
 
-    const amountNet = Number(account.amountNet);
-    const amountTax = Number(account.amountTax);
-    if (!Number.isFinite(amountNet) || !Number.isFinite(amountTax)) return null;
+    const calculatedTax = (invoice.accounts as any[] || []).reduce((sum, account) => sum + Number(account.amountTax || 0), 0);
+    const overriddenTax = Number(invoice.taxAmountOverride);
+    if (!Number.isFinite(overriddenTax) || Math.abs(overriddenTax - calculatedTax) < 0.005) return null;
 
-    const calculatedTax = Number((amountNet * (taxRate / 100)).toFixed(2));
-    if (Math.abs(amountTax - calculatedTax) < 0.005) return null;
-
-    return `USt pruefen ${displayCurrency(amountTax, true)}`;
+    return {
+        amount: overriddenTax,
+        correction: Number((overriddenTax - calculatedTax).toFixed(2)),
+    };
 };
 
 const getCreatedDocumentRevenueLines = (document: any) => {
@@ -368,7 +367,12 @@ export async function buildExportZip(
         // ER
         incominginvoicesList.forEach(ii => {
             const accs = ii.accounts as any[] || [];
-            accs.forEach(account => {
+            const taxOverride = getIncomingInvoiceTaxOverride(ii);
+            const correctionAccountIndex = taxOverride
+                ? Math.max(0, accs.findIndex(account => account.taxType === "19" || account.taxType === "7"))
+                : -1;
+
+            accs.forEach((account, accountIndex) => {
                 let file = filesIncomingInvoices.find(i => i.incominginvoice === ii.id);
                 let accountData = accountsList.find(i => i.id === account.account);
                 if (!accountData) return;
@@ -381,10 +385,13 @@ export async function buildExportZip(
                 else if(account.taxType === '7I') buschluessel = "18";
                 else buschluessel = "-";
 
-                let amountGross =/* account.amountGross ? account.amountGross : */(account.amountNet || 0) + (account.amountTax || 0);
+                let amountGross = Number(account.amountNet || 0) + Number(account.amountTax || 0);
+                if (taxOverride && accountIndex === correctionAccountIndex) amountGross += taxOverride.correction;
                 let shSelector = Math.sign(amountGross) === -1 ? "H" : "S";
-                const taxReview = getIncomingInvoiceTaxReview(account);
-                let text = `${taxReview ? `${taxReview} - ` : ""}ER ${ii.reference}: ${escapeString(ii.description)}`.substring(0,59);
+                const taxReview = taxOverride && accountIndex === correctionAccountIndex
+                    ? `USt pruefen ${displayCurrency(taxOverride.amount, true)} - `
+                    : "";
+                let text = `${taxReview}ER ${ii.reference}: ${escapeString(ii.description)}`.substring(0,59);
                 const vend = ii.vendor; // durch Mapping verfügbar
 
                 bookingLines.push(`${Math.abs(amountGross).toFixed(2).replace(".",",")};"${shSelector}";;;;;${accountData.number};${vend?.vendorNumber || ""};"${buschluessel}";${formatDatevDate(ii.date, "DDMM")};"${ii.reference}";;;"${text}";;;;;;${file ? `"BEDI ""${file.id}"""` : ""};"Geschäftspartner";"${vend?.name || ""}";"Kundennummer";"${vend?.vendorNumber || ""}";"Belegnummer";"${ii.reference}";"Leistungsdatum";"${formatDatevDate(ii.date, "DD.MM.YYYY")}";"Belegdatum";"${formatDatevDate(ii.date, "DD.MM.YYYY")}";;;;;;;;;;"";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;0;;;;"";;;;;;;`);

backend/src/utils/liquidityForecast.ts

@@ -287,6 +287,12 @@ const getIncomingInvoiceTaxBreakdown = (invoice: any): TaxBreakdown => {
         }
     });
 
+    if (invoice?.taxAmountOverride !== null && invoice?.taxAmountOverride !== undefined && invoice?.taxAmountOverride !== "") {
+        const correction = Number(invoice.taxAmountOverride) - breakdown.tax19 - breakdown.tax7;
+        if (breakdown.tax19 !== 0 || breakdown.net19 !== 0) breakdown.tax19 += correction;
+        else if (breakdown.tax7 !== 0 || breakdown.net7 !== 0) breakdown.tax7 += correction;
+    }
+
     return {
         net19: roundMoney(breakdown.net19),
         tax19: roundMoney(breakdown.tax19),
@@ -297,9 +303,14 @@ const getIncomingInvoiceTaxBreakdown = (invoice: any): TaxBreakdown => {
 };
 
 const getIncomingInvoiceSignedAmount = (invoice: any) => {
-    const amount = (invoice.accounts || []).reduce((sum: number, account: any) => {
-        return sum + Number(account.amountNet || 0) + Number(account.amountTax || 0);
-    }, 0);
+    const totals = (invoice.accounts || []).reduce((result: { net: number, tax: number }, account: any) => ({
+        net: result.net + Number(account.amountNet || 0),
+        tax: result.tax + Number(account.amountTax || 0),
+    }), { net: 0, tax: 0 });
+    const tax = invoice.taxAmountOverride !== null && invoice.taxAmountOverride !== undefined && invoice.taxAmountOverride !== ""
+        ? Number(invoice.taxAmountOverride)
+        : totals.tax;
+    const amount = totals.net + tax;
 
     return roundMoney(invoice.expense === false ? amount : amount * -1);
 };

frontend/components/displayTaxSummary.vue

@@ -6,6 +6,7 @@ import {
   formatTaxEvaluationPeriodRange,
   getCreatedDocumentTaxBreakdown,
   getIncomingInvoiceTaxBreakdown,
+  getManualBookingTaxBreakdown,
   getTaxEvaluationPeriodBounds,
   normalizeTaxEvaluationPeriod
 } from "~/composables/useTaxEvaluation"
@@ -40,7 +41,10 @@ const loadSummary = async () => {
     const periodType = normalizeTaxEvaluationPeriod(auth.activeTenantData?.taxEvaluationPeriod)
     const bounds = getTaxEvaluationPeriodBounds(dayjs(), periodType)
 
-    const { createdDocuments: docs, incomingInvoices: incoming } = await loadCoreData()
+    const [{ createdDocuments: docs, incomingInvoices: incoming }, manualBookings] = await Promise.all([
+      loadCoreData(),
+      useNuxtApp().$api("/api/banking/manual-bookings") as Promise<any[]>
+    ])
 
     const outputDocs = (docs || []).filter((doc: any) => {
       if (doc?.state !== "Gebucht") return false
@@ -67,12 +71,28 @@ const loadSummary = async () => {
       return sum + breakdown.tax19 + breakdown.tax7
     }, 0)
 
+    const manualTax = (manualBookings || [])
+        .filter((booking: any) => {
+          const date = dayjs(booking.manualBookingDate)
+          return date.isValid() && !date.isBefore(bounds.start, "day") && !date.isAfter(bounds.end, "day")
+        })
+        .reduce((sum: { outputTax19: number; inputTax19: number }, booking: any) => {
+          const breakdown = getManualBookingTaxBreakdown(booking)
+          return {
+            outputTax19: sum.outputTax19 + breakdown.outputTax19,
+            inputTax19: sum.inputTax19 + breakdown.inputTax19,
+          }
+        }, { outputTax19: 0, inputTax19: 0 })
+
+    const totalOutputTax = outputTax + manualTax.outputTax19
+    const totalInputTax = inputTax + manualTax.inputTax19
+
     summary.value = {
       label: formatTaxEvaluationPeriodLabel(bounds.start, periodType),
       range: formatTaxEvaluationPeriodRange(bounds.start, periodType),
-      outputTax: Number(outputTax.toFixed(2)),
-      inputTax: Number(inputTax.toFixed(2)),
-      balance: Number((outputTax - inputTax).toFixed(2)),
+      outputTax: Number(totalOutputTax.toFixed(2)),
+      inputTax: Number(totalInputTax.toFixed(2)),
+      balance: Number((totalOutputTax - totalInputTax).toFixed(2)),
       outputCount: outputDocs.length,
       inputCount: inputDocs.length,
     }

frontend/composables/useDepreciation.ts

@@ -222,13 +222,24 @@ export const getIncomingInvoiceImmediateExpenseNet = (invoice: any) => {
 }
 
 export const getIncomingInvoiceImmediateExpenseGross = (invoice: any) => {
-    return Number(((invoice?.accounts || []).reduce((sum: number, account: any) => {
+    const immediateAccounts = (invoice?.accounts || []).filter((account: any) => {
+        const normalized = normalizeIncomingInvoiceAccount(account, invoice?.date)
+        return !isDepreciationBookingMode(normalized.bookingMode)
+    })
+    const gross = immediateAccounts.reduce((sum: number, account: any) => {
         const normalized = normalizeIncomingInvoiceAccount(account, invoice?.date)
-        if (isDepreciationBookingMode(normalized.bookingMode)) return sum
-
         const amountGross = Number(normalized.amountGross)
         return sum + (Number.isFinite(amountGross) ? amountGross : Number(normalized.amountNet || 0) + Number(normalized.amountTax || 0))
-    }, 0)).toFixed(2))
+    }, 0)
+    const calculatedTax = (invoice?.accounts || []).reduce((sum: number, account: any) => sum + Number(account.amountTax || 0), 0)
+    const correction = immediateAccounts.length > 0
+        && invoice?.taxAmountOverride !== null
+        && invoice?.taxAmountOverride !== undefined
+        && invoice?.taxAmountOverride !== ""
+        ? Number(invoice.taxAmountOverride) - calculatedTax
+        : 0
+
+    return Number((gross + correction).toFixed(2))
 }
 
 export const getIncomingInvoiceDepreciationRows = (invoice: any, rangeStart: any, rangeEnd: any) => {

frontend/composables/useSum.js

@@ -12,17 +12,15 @@ export const useSum = () => {
     }
 
     const getIncomingInvoiceSum = (invoice) => {
-        let sum = 0
-        invoice.accounts.forEach(account => {
+        const totals = (invoice.accounts || []).reduce((result, account) => ({
+            net: result.net + Number(account.amountNet || 0),
+            tax: result.tax + Number(account.amountTax || 0)
+        }), { net: 0, tax: 0 })
+        const tax = invoice.taxAmountOverride !== null && invoice.taxAmountOverride !== undefined && invoice.taxAmountOverride !== ""
+            ? Number(invoice.taxAmountOverride)
+            : totals.tax
 
-
-            sum += account.amountTax
-            sum += account.amountNet
-
-
-
-        })
-        return sum.toFixed(2)
+        return (totals.net + tax).toFixed(2)
     }
 
     const getCreatedDocumentSum = (createddocument,createddocuments = []) => {

frontend/composables/useTaxEvaluation.ts

@@ -152,6 +152,12 @@ export const getIncomingInvoiceTaxBreakdown = (invoice: any) => {
         }
     })
 
+    if (invoice?.taxAmountOverride !== null && invoice?.taxAmountOverride !== undefined && invoice?.taxAmountOverride !== "") {
+        const correction = Number(invoice.taxAmountOverride) - breakdown.tax19 - breakdown.tax7
+        if (breakdown.tax19 !== 0 || breakdown.net19 !== 0) breakdown.tax19 += correction
+        else if (breakdown.tax7 !== 0 || breakdown.net7 !== 0) breakdown.tax7 += correction
+    }
+
     return {
         net19: Number(breakdown.net19.toFixed(2)),
         tax19: Number(breakdown.tax19.toFixed(2)),
@@ -160,3 +166,33 @@ export const getIncomingInvoiceTaxBreakdown = (invoice: any) => {
         net0: Number(breakdown.net0.toFixed(2)),
     }
 }
+
+const getSkr03AccountNumber = (account: any) => {
+    if (!account || String(account.accountChart || "").toLowerCase() !== "skr03") return null
+    return String(account.number || "")
+}
+
+export const getManualBookingTaxBreakdown = (booking: any) => {
+    const amount = Number(booking?.amount || 0)
+    const breakdown = { outputTax19: 0, inputTax19: 0 }
+
+    if (!Number.isFinite(amount) || amount === 0) return breakdown
+
+    const applySide = (account: any, side: "debit" | "credit") => {
+        const accountNumber = getSkr03AccountNumber(account)
+
+        if (accountNumber === "1576") {
+            breakdown.inputTax19 += side === "debit" ? amount : -amount
+        } else if (accountNumber === "1776") {
+            breakdown.outputTax19 += side === "credit" ? amount : -amount
+        }
+    }
+
+    applySide(booking.account, "debit")
+    applySide(booking.contraAccount, "credit")
+
+    return {
+        outputTax19: Number(breakdown.outputTax19.toFixed(2)),
+        inputTax19: Number(breakdown.inputTax19.toFixed(2)),
+    }
+}

frontend/pages/accounting/cashbooks/[id].vue

@@ -46,9 +46,7 @@ const currentBalance = computed(() => {
 })
 
 const getIncomingInvoiceGross = (invoice) => {
-  return Number((invoice.accounts || []).reduce((sum, account) => {
-    return sum + Number(account.amountNet || 0) + Number(account.amountTax || 0)
-  }, 0))
+  return Number(useSum().getIncomingInvoiceSum(invoice))
 }
 
 const getIncomingInvoiceOpenAmount = (invoice) => {

frontend/pages/accounting/manual-bookings.vue

@@ -68,9 +68,7 @@ const buildEntries = (rows, type, labelBuilder) =>
     }))
 
 const getIncomingInvoiceGross = (invoice) => {
-  return Number((invoice.accounts || []).reduce((sum, account) => {
-    return sum + Number(account.amountNet || 0) + Number(account.amountTax || 0)
-  }, 0))
+  return Number(useSum().getIncomingInvoiceSum(invoice))
 }
 
 const getIncomingInvoiceOpenAmount = (invoice) => {

frontend/pages/accounting/tax.vue

@@ -6,6 +6,7 @@ import {
   formatTaxEvaluationPeriodRange,
   getCreatedDocumentTaxBreakdown,
   getIncomingInvoiceTaxBreakdown,
+  getManualBookingTaxBreakdown,
   getTaxEvaluationPeriodBounds,
   normalizeTaxEvaluationPeriod,
   shiftTaxEvaluationPeriodStart
@@ -18,6 +19,7 @@ const auth = useAuthStore()
 const loading = ref(true)
 const createdDocuments = ref<any[]>([])
 const incomingInvoices = ref<any[]>([])
+const manualBookings = ref<any[]>([])
 
 const periodType = computed(() => normalizeTaxEvaluationPeriod(auth.activeTenantData?.taxEvaluationPeriod))
 
@@ -40,13 +42,15 @@ const loadData = async () => {
   loading.value = true
 
   try {
-    const [docs, incoming] = await Promise.all([
+    const [docs, incoming, manual] = await Promise.all([
       useEntities("createddocuments").select(),
-      useEntities("incominginvoices").select()
+      useEntities("incominginvoices").select(),
+      useNuxtApp().$api("/api/banking/manual-bookings")
     ])
 
     createdDocuments.value = (docs || []).filter(isRelevantOutputDocument)
     incomingInvoices.value = (incoming || []).filter(isRelevantInputInvoice)
+    manualBookings.value = (manual as any[]) || []
   } finally {
     loading.value = false
   }
@@ -69,6 +73,19 @@ const periods = computed(() => {
       return date.isValid() && !date.isBefore(bounds.start, "day") && !date.isAfter(bounds.end, "day")
     })
 
+    const manualTax = manualBookings.value
+        .filter((booking) => {
+          const date = dayjs(booking.manualBookingDate)
+          return date.isValid() && !date.isBefore(bounds.start, "day") && !date.isAfter(bounds.end, "day")
+        })
+        .reduce((sum, booking) => {
+          const breakdown = getManualBookingTaxBreakdown(booking)
+          return {
+            outputTax19: sum.outputTax19 + breakdown.outputTax19,
+            inputTax19: sum.inputTax19 + breakdown.inputTax19,
+          }
+        }, { outputTax19: 0, inputTax19: 0 })
+
     const output = outputDocs.reduce((sum, doc) => {
       const breakdown = getCreatedDocumentTaxBreakdown(doc)
       return {
@@ -91,6 +108,9 @@ const periods = computed(() => {
       }
     }, { net19: 0, tax19: 0, net7: 0, tax7: 0, net0: 0 })
 
+    output.tax19 = Number((output.tax19 + manualTax.outputTax19).toFixed(2))
+    input.tax19 = Number((input.tax19 + manualTax.inputTax19).toFixed(2))
+
     const outputTax = Number((output.tax19 + output.tax7).toFixed(2))
     const inputTax = Number((input.tax19 + input.tax7).toFixed(2))
     const balance = Number((outputTax - inputTax).toFixed(2))
@@ -146,7 +166,7 @@ onMounted(loadData)
       </h2>
       <p class="text-sm text-gray-500 dark:text-gray-400">
         Intervall: {{ periodType === "monthly" ? "monatlich" : periodType === "quarterly" ? "quartalsweise" : "jährlich" }}.
-        Berücksichtigt werden gebuchte Ausgangsrechnungen, Abschlags- und Stornorechnungen sowie gebuchte Eingangsbelege mit Datum.
+        Berücksichtigt werden gebuchte Ausgangsrechnungen, Abschlags- und Stornorechnungen, gebuchte Eingangsbelege sowie manuelle Buchungen auf SKR03 1576 und 1776.
       </p>
       <p v-if="currentPeriod" class="text-sm text-gray-500 dark:text-gray-400">
         {{ currentPeriod.range }}

frontend/pages/banking/index.vue

@@ -230,13 +230,7 @@ const calculateOpenSum = (statement) => {
 }
 
 const getInvoiceSum = (invoice, onlyOpenSum) => {
-  let sum = 0
-  if (invoice.accounts) {
-    invoice.accounts.forEach(account => {
-      sum += (account.amountTax || 0)
-      sum += (account.amountNet || 0)
-    })
-  }
+  let sum = Number(useSum().getIncomingInvoiceSum(invoice))
 
   if (onlyOpenSum) sum = sum + Number(invoice.statementallocations.reduce((n, {amount}) => n + amount, 0))
 

frontend/pages/banking/statements/[mode]/[[id]].vue

@@ -130,13 +130,7 @@ const separateIBAN = (input) => {
 }
 
 const getInvoiceSum = (invoice, onlyOpenSum) => {
-  let sum = 0
-  if (invoice.accounts) {
-    invoice.accounts.forEach(account => {
-      sum += (account.amountTax || 0)
-      sum += (account.amountNet || 0)
-    })
-  }
+  let sum = Number(useSum().getIncomingInvoiceSum(invoice))
 
   if (onlyOpenSum) sum = sum + Number(invoice.statementallocations.reduce((n, {amount}) => n + amount, 0))
 

frontend/pages/incomingInvoices/[mode]/[id].vue

@@ -103,6 +103,8 @@ watch(() => itemInfo.value.date, (value) => {
 
 // --- Berechnungslogik ---
 const useNetMode = ref(false)
+const editingTotalTax = ref(false)
+const totalTaxDraft = ref(null)
 
 const taxOptions = ref([
   { label: "19% USt", percentage: 19, key: "19" },
@@ -186,24 +188,17 @@ const totalCalculated = computed(() => {
     }
   })
 
-  totalGross = Number(totalNet + totalAmount19Tax + totalAmount7Tax)
+  const calculatedTax = Number(totalAmount19Tax + totalAmount7Tax)
+  const hasTaxOverride = itemInfo.value.taxAmountOverride !== null && itemInfo.value.taxAmountOverride !== undefined && itemInfo.value.taxAmountOverride !== ""
+  const totalTax = hasTaxOverride ? Number(itemInfo.value.taxAmountOverride) : calculatedTax
+  totalGross = Number(totalNet + totalTax)
 
-  return { totalNet, totalAmount19Tax, totalAmount7Tax, totalGross }
+  return { totalNet, totalAmount19Tax, totalAmount7Tax, calculatedTax, totalTax, totalGross, hasTaxOverride }
 })
 
 const hasAmount = (value) => value !== null && value !== undefined && value !== ""
 const hasValidNumber = (value) => hasAmount(value) && Number.isFinite(Number(value))
 const isDepreciationItem = (item) => isDepreciationBookingMode(item?.bookingMode)
-const getCalculatedTax = (item) => {
-  const taxRate = Number(taxOptions.value.find((tax) => tax.key === item.taxType)?.percentage || 0)
-
-  return Number((Number(item.amountNet || 0) * (taxRate / 100)).toFixed(2))
-}
-const hasManualTaxDifference = (item) => {
-  if (!hasValidNumber(item.amountTax) || !hasValidNumber(item.amountNet)) return false
-
-  return Math.abs(Number(item.amountTax) - getCalculatedTax(item)) >= 0.005
-}
 
 const updateBookingMode = (item) => {
   ensureDepreciationDefaults(item, itemInfo.value.date)
@@ -226,14 +221,6 @@ const recalculateItem = (item, source) => {
     calculateFromNet()
   } else if (source === 'gross') {
     calculateFromGross()
-  } else if (source === 'tax') {
-    if(!hasValidNumber(item.amountTax)) return
-
-    if((useNetMode.value || !hasAmount(item.amountGross)) && hasAmount(item.amountNet)) {
-      item.amountGross = Number((Number(item.amountNet) + Number(item.amountTax)).toFixed(2))
-    } else if(hasAmount(item.amountGross)) {
-      item.amountNet = Number((Number(item.amountGross) - Number(item.amountTax)).toFixed(2))
-    }
   } else if (source === 'taxType' || source === 'manual') {
     if(hasAmount(item.amountNet)) calculateFromNet()
     else if(hasAmount(item.amountGross)) calculateFromGross()
@@ -246,6 +233,19 @@ const moveGrossToNet = (item) => {
   recalculateItem(item, 'net')
 }
 
+const startEditingTotalTax = () => {
+  totalTaxDraft.value = totalCalculated.value.totalTax.toFixed(2)
+  editingTotalTax.value = true
+}
+
+const applyTotalTaxOverride = () => {
+  if (!hasValidNumber(totalTaxDraft.value)) return
+
+  const value = Number(Number(totalTaxDraft.value).toFixed(2))
+  itemInfo.value.taxAmountOverride = Math.abs(value - totalCalculated.value.calculatedTax) >= 0.005 ? value : null
+  editingTotalTax.value = false
+}
+
 // --- Saving ---
 const updateIncomingInvoice = async (setBooked = false) => {
   if (setBooked && hasBlockingIncomingInvoiceErrors.value) {
@@ -889,30 +889,13 @@ const hasBlockingIncomingInvoiceErrors = computed(() => blockingIncomingInvoiceE
                 </div>
 
                 <div class="col-span-6 md:col-span-3">
-                  <UFormField label="Steuerbetrag" help="Kann bei Rundungsabweichungen angepasst werden">
-                    <UInput
-                        class="w-full"
-                        type="number"
-                        step="0.01"
-                        :model-value="item.amountTax"
-                        :disabled="mode === 'show'"
-                        @update:model-value="(val) => { item.amountTax = Number(val); recalculateItem(item, 'tax') }"
-                    >
+                  <UFormField label="Steuerbetrag" help="Automatisch berechnet">
+                    <UInput class="w-full" :model-value="item.amountTax" disabled color="gray">
                       <template #trailing>€</template>
                     </UInput>
                   </UFormField>
                 </div>
 
-                <div v-if="hasManualTaxDifference(item)" class="col-span-12">
-                  <UAlert
-                      color="warning"
-                      variant="soft"
-                      icon="i-heroicons-exclamation-triangle"
-                      title="Steuerbetrag manuell angepasst"
-                      description="FEDEO verwendet diesen Betrag für Auswertungen und Summen. Im DATEV-Export wird bei der Automatikbuchung nur der Bruttobetrag mit Steuerschlüssel übertragen; DATEV berechnet die Steuer dort erneut."
-                  />
-                </div>
-
                 <div class="col-span-12 flex justify-end gap-2">
                   <UButton
                       size="xs"
@@ -958,14 +941,34 @@ const hasBlockingIncomingInvoiceErrors = computed(() => blockingIncomingInvoiceE
                   <span>Netto Gesamt</span>
                   <span>{{ totalCalculated.totalNet.toFixed(2) }} €</span>
                 </div>
-                <div class="flex justify-between text-gray-500" v-if="totalCalculated.totalAmount7Tax > 0">
-                  <span>+ 7% USt</span>
-                  <span>{{ totalCalculated.totalAmount7Tax.toFixed(2) }} €</span>
+                <div class="flex items-center justify-between gap-3 text-gray-500">
+                  <span class="flex items-center gap-2">
+                    USt gesamt
+                    <UBadge v-if="totalCalculated.hasTaxOverride" size="xs" color="warning" variant="soft">Manuell</UBadge>
+                  </span>
+                  <div v-if="editingTotalTax" class="flex items-center gap-1">
+                    <UInput v-model="totalTaxDraft" type="number" step="0.01" size="xs" class="w-28">
+                      <template #trailing>€</template>
+                    </UInput>
+                    <UButton icon="i-heroicons-check" size="xs" variant="ghost" @click="applyTotalTaxOverride" />
+                    <UButton icon="i-heroicons-x-mark" size="xs" color="neutral" variant="ghost" @click="editingTotalTax = false" />
                   </div>
-                <div class="flex justify-between text-gray-500" v-if="totalCalculated.totalAmount19Tax > 0">
-                  <span>+ 19% USt</span>
-                  <span>{{ totalCalculated.totalAmount19Tax.toFixed(2) }} €</span>
+                  <div v-else class="flex items-center gap-1">
+                    <span>{{ totalCalculated.totalTax.toFixed(2) }} €</span>
+                    <UButton
+                        v-if="mode !== 'show'"
+                        icon="i-heroicons-pencil"
+                        size="xs"
+                        color="neutral"
+                        variant="ghost"
+                        aria-label="Gesamten USt-Betrag bearbeiten"
+                        @click="startEditingTotalTax"
+                    />
                   </div>
+                </div>
+                <p v-if="totalCalculated.hasTaxOverride" class="text-xs text-amber-600 dark:text-amber-400">
+                  DATEV berechnet die USt aus dem Bruttobetrag erneut. Der Export wird mit „USt prüfen“ markiert.
+                </p>
                 <div class="flex justify-between font-bold text-xl text-gray-900 dark:text-white pt-2 border-t dark:border-gray-700">
                   <span>Rechnungsbetrag</span>
                   <span>{{ totalCalculated.totalGross.toFixed(2) }} €</span>

frontend/pages/incomingInvoices/index.vue

@@ -141,12 +141,7 @@ const displayCurrency = (value, currency = "€") => {
   return `${Number(value).toFixed(2).replace(".",",")} ${currency}`
 }
 const getInvoiceSum = (invoice) => {
-  let sum = 0
-  invoice.accounts.forEach(account => {
-    sum += account.amountTax
-    sum += account.amountNet
-  })
-  return sum.toFixed(2)
+  return useSum().getIncomingInvoiceSum(invoice)
 }
 
 const getPaidAmount = (item) => {