Liana Ophelie

Last Day To File Taxes 2024 Extension Deadline. Most taxpayers who requested an extension of time to file their 2023 tax return. Farmers and fishermen pay estimated tax for 2023.

For tax year 2023 (filed in 2024), you needed to submit your tax extension request by monday, april 15—the regular tax filing deadline—or face a penalty. But if you prefer to mail a paper version of the extension, called form 4868, make sure it’s postmarked.