Montana status as a resident can’t be lost until residency in another state or country is gained.

Mont. Code Ann. § 1-1-215(3).

Foreign Earned Income Exclusion = Yes

Foreign Tax Credits = Yes

Treaty = No

Due Date = April 15

Accepts Federal Extensions = No extension is required when 90% or more of the tax payable has been paid. If there is a balance, file form EXT-13