Before we can answer that, it is important to understand your specific situation, because the deadline is not the same for everyone. Taxpayers can be divided in two big groups: Group 1: It is NOT declaring self-employment income (Neither you or spouse) Group 2: It IS declaring  self-employment income (You or spouse) Are you declaring self employment income? You are declaring self-employment income if any of these situations happened in 2024: Issued invoices during the year (i