Every file the app produces and where to find it

Who: the exports below (bookings, journal, DATEV, reports, GoBD package, documents) need the export right. Owner, admin, accountant and tax advisor have it; bookkeeper and client roles do not, and the app refuses them. The audit trail and the receipt count have their own rights, see their pages.
Invoices and other sales documents: after you finalize one, a background job makes its PDF and stores it unalterably. The document block first says The PDF is being created and archived unalterably. Then Download PDF appears, named after the number. If it failed, choose Try again; sending stays blocked until the PDF is stored. A business customer in your own country also gets an e-invoice file, shown as Download XML (XRechnung or ZUGFeRD); private customers and buyers abroad get the PDF only. The first download is recorded, and from then on the invoice can no longer be voided, only cancelled with a cancellation invoice. The draft preview is watermarked and never stored. On Invoices, Sales invoice journal (CSV) lists the issued invoices only (file rechnungsausgangsbuch- plus the client's ID).
Bookings: on Bookings the buttons CSV (transactions-<short name>.csv) and ZIP (accounting-ai-export-<short name>.zip, with the linked documents and issued PDFs), DATEV (EXTF_Buchungsstapel_...csv, see the DATEV export page) and DATEV master data (EXTF_Debitoren_Kreditoren_...csv, the names and addresses behind the customer and supplier account numbers). Left out without a message on screen: bookings of a contact whose erasure request was refused, and, in the ZIP, restricted documents such as payslips for members without the payroll right. The column names of the CSV are fixed technical English names in every language.
Reports: on Bookings, Reports, each of Trial balance, BWA and P&L (GuV) has a CSV button (files SuSa_, BWA_, GuV_ with the short name and period), and a PDF button for the report as a document. P&L (GuV) exists only for clients that keep a balance sheet; an EÜR client has no GuV file. VAT return / ZM offers VAT return CSV, Summary (HTML) and ZM CSV (BZSt); it needs the VAT return switched on for the client and is a draft, nothing goes to ELSTER. Below it, UStVA working paper can be generated and downloaded as an Excel file.
Settings: GoBD export builds the data package for a tax audit (a ZIP: index.xml, one CSV per table with semicolons, no header row and amounts in cents, the originals and a list with their SHA-256 fingerprints). A ready package stays available for a limited time (30 days by default); when it has expired, use Build again. Audit trail has Download CSV (audit-log.csv).
Documents and letters: with the Documents area switched on, each document offers Download PDF and Download Word, and Retry if a file failed. On the page of a received document, Download original saves the file you uploaded. A dunning letter opens as a PDF with Preview in the invoice's Dunning section and goes out as a PDF attachment when it is sent.
Billing: the receipt count and fee statement is a Download CSV on the Billing page (file receipt-count- plus the month), for owners and admins.