If you are unable to file your return by the original due date, Maine will allow an automatic six-month extension of time in which to file your return. Requests for additional time beyond the automatic six-month extension to file must be submitted in writing prior to the expiration of the six-month period. Generally, the total extension period cannot exceed eight months. The automatic extension is only effective if the return is filed within the six-month period.
A penalty for failure to file will not be assessed if you file your return by the extended due date. However, to avoid penalties for late payment, you must pay at least 90 percent of the tax you owe by the original return due date. Please remit your estimated tax payment with the extension payment voucher available at http://www.maine.gov/revenue/forms. Interest will be charged on any unpaid tax balance remaining after the original return due date regardless of any extensions filed.