Business Tax Return Due Date 2024 Extension Date. You can extend most business tax returns by filing form 7004. Sole proprietors and c corporations must apply for an extension by april 15, 2024.

You can extend the due date for filing your personal income tax return by six months (e.g., to october 15, 2024, for 2023 tax year returns) by filing form 4868 or making an electronic tax payment before the april 15 (or april 17) deadline. This typically grants an additional six months to file the.