Every entry can be used as sender or client. Logos, bank details, tax IDs and numbering live here and fill the invoice automatically.
Saved services and products for the "Add from catalogue" drop-down.
The server keeps the last 50 versions automatically. You can also download everything as one JSON file or restore from one.
The checks follow § 14 / § 14a / § 19 UStG and § 35a GmbHG (Germany), Art.º 36.º CIVA and the certified-software rule (Portugal) and the EU VAT Directive 2006/112/EC (Art. 196, 226). They catch missing mandatory data and the wrong VAT treatment; they don't replace the tax adviser for special cases (construction § 13b, OSS, margin schemes, turnover limits).