nostr:npub1l3gpk6vrudg8r67swqlex5alv9ch59s4lw46kk6hekuxe2n3aczsyqvu48 As a suggestion, you could look at https://www.frontaccounting.com/ and host on your local machine/server or run your own server on the net.

Generally quite good but localizing for VAT and stuff was more involved when I used it last.

Their demo at https://frontaccounting.com/wbt/pages/home/demo.php will help check it through a bit.