Get your taxes done using TurboTax

You do need to file the MA return and you will allocate income within the program. Follow these steps:

1. Go through MA and you will see How MA handles income for Nonresidents
2. Continue
3. Apportion your wages?
4. Yes
5. You will see your employer and wages, select Edit
6. Select the method you want to use - click Learn more in the program if you need help, it sounds like you are working days.
7. Continue
8. Enter your information  - in your case 300 hours is 37.5 days and we know 1 out of 5 working days is 20% of your income so your days outside would be 4 times that amount. Unless you are in sales or some other line of work that is not straight pay.

Page 3 of the instructions says MA sourced income is the taxable amount.