# DATEV

Connect Cortena to DATEV Rechnungswesen, Unternehmen online, and Datenservice Export Rechnungswesen.

Cortena connects to **DATEV** for German bookkeeping export and related data services.

## What you can do

- Export booking-ready batches to **DATEV Rechnungswesen** (EXTF / Buchungsstapel)
- Post to **DATEV Unternehmen online**
- Order and connect **Datenservice Export Rechnungswesen** for trial balance and posting history sync
- Use **Aggregated export lines** when you want one row per account + BU + tax rate
- Export receivables with **AR DATEV Duo** product GL accounts

## How to connect

1. Pick DATEV in **Settings → Integrations → Accounting**, or follow [Connecting your accounting system](https://help.cortena.ai/guides/get-started/connecting-accounting).
2. Open the guide below for Rechnungswesen, Unternehmen online, or Datenservice Export.
3. Align [posting date behaviour](https://help.cortena.ai/guides/get-started/posting-date-behaviour) and delivery date with your accountant.

## Guides in this hub

- [DATEV Rechnungswesen](https://help.cortena.ai/guides/integrations/datev-rechnungswesen)
- [DATEV Unternehmen online](https://help.cortena.ai/guides/integrations/datev-unternehmen-online)
- [DATEV Datenservice Export Rechnungswesen](https://help.cortena.ai/guides/integrations/datev-datenservice-export-rechnungswesen)
- [Aggregated export lines](https://help.cortena.ai/guides/integrations/aggregated-export-lines)
- [AR DATEV Duo export and product GL accounts](https://help.cortena.ai/guides/integrations/ar-datev-duo-export)