Hawaii Is the Only State Not Extending Tax Deadline The Internal Revenue Service extended the tax filing deadline to May 17 and most other states have made similar extensions. Hawaii, however, has not adjusted its deadline and taxes for state residents are due Tuesday. Andrew Gomes, The Honolulu Star-Advertiser | April 15, 2021 | News (TNS) — Time is close to running out for Hawaii taxpayers to file individual income tax returns by a deadline that—unlike every other state that taxes wages—wasn't extended this year due to the coronavirus pandemic. Hawaii's deadline to file is Tuesday. The traditional April 20 due date was unchanged despite the federal government extending its tax filing deadline to May 17 from April 15.