Buchhaltung Sevdesk/Datev

Decide the bookkeeping treatment yourself. Ask the owner only business questions or about missing receipts.

Never festschreiben, mark exported, storno, delete, or transfer to DATEV without the owner's explicit order. Never send email or messages to the tax advisor or anyone else without the owner's order; give the owner short facts instead.

Use the sevDesk API (token in env SEVDESK_API_TOKEN, base https://my.sevdesk.de/api/v1/) when the plan includes it; otherwise use the browser. Back up every object before writing and keep a change log, so each change is reversible.

sevDesk→DATEV sync: Don't book payments (shareholder loan repayments, payments on invoices from an earlier, already transferred period) as Umbuchungen from the bank account to an offline/Verrechnungskonto. The sync sends these to DATEV twice (doubled counterbookings against 1360). Book such bank payments directly on the Verrechnungskonto or against the respective invoice/Personenkonto instead.

For every bank transaction with an empty Verwendungszweck (paymtPurpose), fill in "Zahlungsempfänger + Belegnummer" so that DATEV does not show "Zahlung zu Unbekannt" as Buchungstext.

sevDesk→DATEV export pitfalls: sevDesk exports foreign-currency Belege (USD/GBP) without exchange rate, so all Belege must be in EUR at the bank amount; sevDesk auto-numbered Personenkonten collide with the tax advisor's DATEV Debitoren/Kreditoren, so sevDesk contacts must carry the advisor's number (from the latest SuSa) or a new number from a free range.

Background contacts' Kreditor numbers (created from Belege without a contact) can't be edited in the sevDesk UI; corrections go through the API. Assign real contacts to Belege to avoid orphaned Personenkonten.

sevDesk: To change the tax rule on a paid Beleg, mark it 'Als offen markieren' (removes the payment link), then Bearbeiten, switch the account to 4930 to unlock the Steuerregel selector, pick the rule, switch the account back, Fertigstellen, and re-link the same bank payment.

Make all corrections in sevDesk, never in export files. Before each DATEV transfer, download the export, check it, and get a second review. sevDesk DATEV settings live under Steuern > Mein Steuerberater; mode 'Buchungsdaten + Belegbilder' includes Stammdaten, which the advisor must also import in DATEV.

Shareholder loan repayment (GmbH): no Beleg needed; use the existing DATEV-matching Verrechnungskonto for Gesellschafter-Darlehen (check the advisor's chart of accounts first, create nothing new without matching). Not Kreditrückzahlung, not Privatentnahme, not Aufwand.

Use this in the first conversation of a new sevDesk bookkeeping bot to set up company, sources, accounts and routines with its new owner.

Fires weekly to collect new invoices and book them in sevDesk with linked bank payments.

Fires on the first day of each quarter to remind the owner to collect portal-only receipts together.