Spain B2B e-invoicing from 6 October 2027: what invoicing software must shipIf you build invoicing, ERP or accounting software with Spanish customers, the waiting is over: Order HAC/1028/2026 entered into force on 6 October 2026, which fixes the B2B e-invoicing dates in RoyalOct 22 · 4 min readwsystem.hashnode.dev
Norway e-invoicing from 1 January 2027: what invoicing software must shipIf you build invoicing, ERP or accounting software with Norwegian customers, this post sums up what the new Norwegian rules mean for your product: from 1 January 2027 businesses must invoice each otheOct 22 · 3 min readwsystem.hashnode.dev
Poland KSeF from 1 January 2027: what invoicing software must change (fines now planned for 2028)If you build invoicing, POS or payment software with Polish customers, this post gives you what changes on 1 January 2027 when KSeF becomes mandatory for every business, what the government decided onOct 22 · 4 min readwsystem.hashnode.dev
France e-invoicing: what invoicing software must fix before SMEs start issuing on 1 September 2027If you build invoicing or ERP software with French customers, this post gives you where the French reform stands after its first month, what changes on 1 September 2027 when SMEs and micro-enterprisesOct 20 · 5 min readwsystem.hashnode.dev
Greece e-invoicing from 2 November 2026: what invoicing software needs to shipIf you build invoicing or ERP software with Greek customers, this post gives you the dates that matter for the second wave of Greek B2B e-invoicing, what is in scope, why "our ERP talks to myDATA" stoOct 19 · 3 min readwsystem.hashnode.dev
