Tax Extension Deadline 2024 Form Online. If you requested an extension before april 15, 2024, you have extra time to file your return. You have 10 calendar days after the initial date when you transmit a form 1065 electronic return to receive approval on a rejected return.

Extension request deadline (form 7004) for calendar year corporations and estates/trusts: 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.