Phone: (406) 442-1947 Fax: (406) 442-1955
110 E. Lyndale Ave. Helena, MT 59601

Due Dates


Individual
Estimated Tax Payment


Employer Quarterly Reports


Tax Return
s
(for tax year ending Dec. 31)
April 15 April 30 C Corporations – April 15 (If Filing Extension by Due Date – Oct 15)
June 15 July 31 S Corporations – March 15 (If Filing Extension by Due Date – Sept 15)
September 15 October 31 Partnerships – March 15 (If Filing Extension by Due Date – Sept 15)

January 15 
(to have this estimate count for this year it must be made by Dec 31st)
January 31 Individuals – April 15 (If Filing Extension by Due Date – Oct 15)

Note:  If any of these dates fall on a weekend or Holiday, the due date will be the next business day.

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