# FAQ

Short answers that open the full guide. Browse Get started, invoices, workflows, and compliance from here.

- [How to get help](https://help.cortena.ai/guides/support/how-to-get-help): Support channels, what to include, and response times.
- [Connecting your accounting system](https://help.cortena.ai/guides/get-started/connecting-accounting): Pick DATEV, Exact Online, Twinfield, or Agicap and go live.
- [Invoice list, filters, and status](https://help.cortena.ai/guides/invoices/list-filters-status): Find invoices fast with filters, status, and saved views.
- [Approval matrix](https://help.cortena.ai/guides/workflows/approval-matrix): Amount tiers, cost centers, and multi-step approvals.
- [Reprocess](https://help.cortena.ai/guides/invoices/reprocess): Re-run extraction and coding after a change.
- [Duplicates](https://help.cortena.ai/guides/invoices/duplicates): How Cortena groups related documents by supplier and invoice number (optional total / PO / delivery / quote), picks a master, and excludes duplicates from export.
- [Payment status](https://help.cortena.ai/guides/invoices/payment-status): Track what is paid, open, or partially settled.
- [Troubleshooting](https://help.cortena.ai/guides/support/troubleshooting): Common issues and quick fixes.
- [Chrome extension](https://help.cortena.ai/guides/get-started/chrome-extension): Capture and review invoices from your browser.
- [GDPR](https://help.cortena.ai/compliance/gdpr): How Cortena approaches GDPR. Full detail on cortena.ai.