Hello - I am a resident of NH but work in MA 3 days a week and 2 days at home. Do I split my income by doing apportionment percentage?

Yes. Nonresidents of Massachusetts pay income tax on income earned while working in Massachusetts. Approximately 60% (3/5 days) is MA income.

To apportion your wages:

1. Go to the screen “Nonresident Apportionment”
2. Tap EDIT next to your W-2
3. On “Apportionment Method,” choose Working Days, then Continue
4. On “Nonresident Apportionment” fill in the days you worked inside and outside MA.
5. Enter any other “Non-Massachusetts Portion of Income”
6. Continue to “Non-Massachusetts Portion of Deductions.” This is your Social Security and Medicare withholding. Enter the Non-MA Portion. Use Wages earned outside of Massachusetts from earlier divided by Total Income for your percentage (which should be around 40% - 2/5 days)