--- title: "SIEVERS DATEV" id: "997848" type: "page" slug: "sievers-datev" published_at: "2026-08-18T14:38:48+00:00" modified_at: "2026-09-02T09:30:01+00:00" url: "https://ioi.gmbh/en/sievers-datev/" markdown_url: "https://ioi.gmbh/en/sievers-datev.md" --- # The month-end closing works *with one click* to the tax firm. The Microsoft-certified DATEV interface from SIEVERS-GROUP hands over posting batches, charts of accounts and personal accounts in DATEV format to the tax firm accounting system – and reads payroll postings back from LODAS. GoBD-compliant, with formal validation and duplicate export protection. You can license the interface through us. [Request advice →](/en/contact/) [View modules & scope](#versions) Month-end closing## Export to the tax firm The classic case on a monthly cycle: posting and master data leave Business Central as a DATEV-compliant file and are read in at the tax firm without rework – instead of as a stack of PDFs or an Excel workaround. 01 · Selection#### Period and filters Export runs per fiscal year with date and document number filters – on request limited to invoices and credit memos or by origin (purchase, sales). 02 · Check#### Formal check before handover Character sets, document numbers, account lengths: the interface checks DATEV conformity before and during the export – errors surface at your end, not at the tax firm. 03 · Export#### Posting batch in DATEV format General ledger entries go to the tax firm's accounting as a DATEV format file (CSV), gross or net – including foreign currencies, cost quantities and service date. 04 · Control#### Log and indicator Exported entries are flagged, so a double export is ruled out. Every run is logged and can be cancelled if needed. Modules & scope · Export## What the tax firm gets. Data scope### What is transferred Transaction and master data from the same tool – consistent with each other. Transaction data - Posting batch (G/L entries) - Gross or net method - Foreign currencies (160) - Cost quantities Master data - G/L account captions - Customers & vendors - SEPA bank details (optional) Balances - Balance exports - With or without personal accounts **Prerequisite** DATEV (tax firm) accounting on the tax firm side. Format & control### How it arrives DATEV format instead of an in-house build – with validation and evidence. Format - DATEV format (CSV) for DATEVpro - Document numbers up to 36 characters - Service date variants Compliance - GoBD lock indicator - VAT automatic accounts - §13b UStG cases Control - Export log per run - Export entry overview - Double export protection **Chart of accounts** freely selectable – coordination with your tax advisor recommended. Return path## Import from DATEV Not a one-way street: what is posted at the tax firm comes back to Business Central in structured form – above all the payroll postings, which otherwise have to be entered by hand month after month. #### LODAS and Lohn & Gehalt Payroll postings from DATEV LODAS and DATEV Lohn & Gehalt are imported instead of being transferred manually – recurring every month, without typing errors. #### Postings from accounting Journal entries and master data from the tax firm's accounting system can also be transferred back if the firm takes over parts of the bookkeeping. #### Account mapping and number series DATEV account numbers are mapped per account; new customers and vendors automatically receive numbers from the DATEV ranges 10000–69999 and 70000–99999 respectively. #### Automatically or manually Imported records are either posted directly or placed in the journal for review – including handling of open entries. Modules & scope · Import## What comes back and how. Import sources### Where the data comes from The tax firm's usual DATEV programs are supported directly. Payroll - DATEV LODAS (Report 88) - DATEV Lohn & Gehalt Financial accounting - Posting records from DATEVpro - Master data **Cycle** typically monthly with the firm's payroll run. Processing### What Business Central makes of it Mapping and control instead of blind import. Assignment - Account mapping per account - Automatic document number series - Summarize postings Control - Import overview - Carry-forward account filter - Clearing account for personal accounts **Posting** automatically or into the journal for review. Setup & options## Set it up once, then it runs. The interface is set up once for your tax firm – consultant number, chart of accounts, tax keys. After that, the export runs on the closing cycle without anyone readjusting it. #### Tax firm parameters Consultant number, client number, account number length (4–8 digits) and name abbreviation are entered once. #### Tax keys and posting matrix Tax key mapping and the VAT posting matrix map your posting logic to DATEV – including automatic accounts. #### Cost centers and cost objects Business Central dimensions are carried over as KOST1 and KOST2: dimension 1 as cost center, dimension 2 as cost object. #### Document images via the posting data service Optionally, postings including the document image go to the DATEV data center – the tax firm sees the document right next to the posting record. Requires a DATEV subscription. Modules & scope · Setup & license## Cleanly set up, clearly licensed. Setup### What is configured once Together with your tax firm – after that it runs on the closing cycle. Tax firm parameters - Consultant number - Company number - Account number length 4–8 - Initials Tax & accounts - Tax code mapping - VAT posting matrix - Automatic & collective accounts Dimensions - Cost centers → KOST1 - Cost object → KOST2 **Recommendation** Setup together with your tax firm. Operation & license### Where it runs, what it costs Subscription via AppSource or partner – for cloud and OnPremise. Platform - Business Central Cloud (SaaS) - Business Central OnPremise - AL Extension, C/AL for BC 14 - NAV versions under Microsoft support Reference - Subscription - Free trial version (AppSource) - Microsoft-certified Good to know - No payroll master or fixed asset export - The target system is the tax firm's accounting - Document images only with the posting data service **Manufacturer** SIEVERS-GROUP, Osnabrück. FAQ## Frequently asked questions. What does the SIEVERS DATEV interface cost? + The interface is licensed as a subscription. A free trial version is available via AppSource; we will give you the price for your scope on request. Which DATEV programs do we need on the tax firm side? + The target system is DATEV (Kanzlei-)Rechnungswesen. Importing into DATEV Unternehmen online is not provided for by this interface. For document images, an additional subscription for the DATEV-Buchungsdatenservice is required. Does the interface also run OnPremise? + Yes. The interface is available for Business Central Cloud and OnPremise, as an AL Extension and, for Business Central 14, also as a C/AL variant. For NAV versions it applies as long as these are under Microsoft support. Can we also load payroll data back in? + Yes. Payroll postings from DATEV LODAS and DATEV Lohn und Gehalt are imported instead of being entered manually month after month. The interface does not transfer payroll master data or fixed asset data. Does IOI handle the setup with our tax firm? + No. We are your contact for licensing and advise you on the scope. You then coordinate the setup with your tax firm. ## License SIEVERS DATEV through IOI. Try it free. A trial version is available through AppSource. We clarify the appropriate scope with you and take care of the licensing; you coordinate the setup with your tax firm. [Request advice →](/en/contact/) [or give us a quick call: +49 214 8402 3000](tel:004921484023000) ✓ Licensing via IOI as a Microsoft partner ✓ Free trial version via AppSource ✓ Microsoft-certified Add-on ✓ Business Central Cloud and OnPremise