DATEV booking batch structure
A Buchungsstapel is a batch of entries ready to import: SKR accounts, tax keys, text, optionally document images.
EXTF
DATEV EXTF is the journal file format. Comptyx exports that file after review. No DATEV Unternehmen online OAuth sync.
Check the first batch in Kanzlei-Rechnungswesen before running a full month.