Tax, accounting and legal questions, answered with sources

What people ask Azta

• A Hungarian company invoices consulting to a German business — where is the place of supply for VAT?VAT
• We're posting an employee to Austria for four months — what has to be filed, and where are contributions paid?Employment
• A client filed an incorrect VAT return two months ago — how is it corrected, and what does that cost?Procedure
• What changed in 2026 in the charges on employment income, and which act changed it?Updates