Section 141.664 - Annual return; filing; extension of time; failure to file; penalty(1) The filing of a declaration of estimated tax does not excuse the taxpayer from filing an annual return even though there is no change in the declared tax liability. An annual return shall be filed with the city by the end of the fourth month or for tax years after the 1996 tax year and for which a city has entered into an agreement pursuant to section 9 of chapter 1, filed with the department on or before the fifteenth day of the fourth month of the year following that for which the declaration was filed. Upon written request of a taxpayer the administrator or the department may extend the time for filing the annual return for not to exceed 6 months. The administrator or the department may require a tentative return and payment of the estimated tax.(2) A penalty or interest shall not be assessed if the return is filed and the final tax paid within the extended time and all other filing and payment requirements of this ordinance are satisfied, and the estimated tax paid equals 70% or more of the tax shown due on the final return or 70% or more of the tax shown due on the taxpayer's return for the immediately preceding taxable year.1964, Act 284, Imd. Eff. 6/12/1964 ;--Am. 1996, Act 478, Eff. 1/1/1997 .