Get off to a good start
Here you can read about the requirements for documents and digital storage.
Appendix
IAccording to the Bookkeeping Act, all transactions must be accompanied by receipts. In the new Digital Bookkeeping Act, all receipts must also be stored digitally with each entry.
You can read more about the new Digital Bookkeeping Act here.
Which attachments cannot be used:
Receipts from customers must also be stored digitally. Invoice documents are éone appendix and payment voucher is another attachment. DThere must be receipts for both transactions.