Tax Filing Due Date 2024 With Extension. Deadline for filing the 2023 tax return (form 1120) and paying any tax due if an extension is requested. S corp tax return filing:

The irs will accept the current year and 2 previous years of returns for regular, superseded, or amended electronic returns. You have 10 calendar days after the initial date when you transmit a form 1065 electronic return to receive approval on a rejected return.