LANSING, Mich. – The due date for Michigan individual income tax annual returns has been pushed back to May 17, the state treasury department announced. Gretchen Whitmer announced the new filing deadline after the IRS extended its deadline to May 17. Changing the state’s filing and payment deadlines can help individuals figure out their next steps as we navigate these extraordinary times.”AdUnder the new deadline, state individual income tax annual returns and payments are due before 11:59 p.m. May 17. Taxpayers who are owed a refund are encouraged to file their state income tax returns so they can receive their refunds. They should estimate their tax liability and pay any taxes owed by May 17 to avoid additional interest or penalties, state officials said.