Tax Resources
Federal Tax Deadlines
If the due date falls on a holiday or weekend, the due date is the next business day.
* These due dates are based on calendar year filers.
1040 April 15
1041 April 15
1120S March 17
1065 March 17
1120 April 15
**Visit the Maine Revenue website for additional Forms and Due Dates.
Maine Tax Deadlines
If the due date falls on a holiday or weekend, the due date is the next business day.
* These due dates are based on calendar year filers.
1040ME, 1040EXT-ME April 15*
1040ES-ME April 15*, June 15*, September 15*, January 15*
Amended 1040ME Within 180 days of final federal determination or filing of federal Form 1040-X
1041ME, 1041ME-EXT April 15 for calendar year filers, 15th day of the 4th month following the end of the fiscal year for all other filers
1041ES-ME April 15*, June 15*, September 15*, January 15*
Amended 1041ME Within 180 days of final federal determination or filing of an amended federal Form 1041
1120ME, 1120EXT-ME April 15 for calendar year filers, September 15 for filers with a year end of June 30, 15th day of the 4th month following the end of the fiscal year for all other filers
1120ES-ME April 15*, June 15*, September 15*, December 15*
Amended 1120ME Within 180 days of final determination of the federal change or correction or within 180 days of discovery of the error
Income Tax Withholding for Pass-through Entities
941P-ME March 17
901ES-ME April 30, July 31, October 31, January 31
901ES-ME Extension Payment March 15
**Visit the Maine Revenue website for additional Forms and Due Dates.
Where's My Refund
Utilize the IRS "Where's My Refund" page or the Maine Tax Portal "Where's My Refund" to track current and past refunds.
Tax Withholding Estimator
Use this tool to estimate the federal income tax you want your employer to withhold from your paycheck.