For tax year 2023, Massachusetts has a 5.0% tax on both earned (salaries, wages, tips, commissions) and unearned (interest, dividends, and capital gains) income. Certain capital gains are taxed at 8.5%.
Everyone whose Massachusetts gross income is $8,000 or more must file a Massachusetts personal income tax return on or by April 15th following the end of every tax year. If the due date falls on a Saturday, Sunday, or legal holiday, the due date is the next business day. (Note: The $8,000 or more amount is per person and there is no combined filing requirement for a joint return. If an individual meets the $8,000 threshold, they have to file a return and if married, they have the option to file jointly whether or not the spouse has their own filing requirement.)
If you've made an error on a return you've already filed, file an amended return.