Tax Filing Deadline 2024 Indiana State. Dor urges everyone to wait to file their tax returns until they receive all their official tax documents and statements. In that case, it will need to be postmarked on the next business day.
That’s on a monday this year and will be here before we know it. A timely filed extension moves the federal tax filing deadline to october 15, 2021, and the indiana filing deadline to november 15, 2021.