You need to prepare your non-resident state return first in order to be able to allocate the income correctly. To do this in TurboTax Online you can follow these steps:
- Within your tax return click State in the black menu bar on the left of the screen
- Click Continue to the screen that lists both state returns
- Use the trash can icon to delete the resident state return (Maryland)
- Click Edit for the Illinois return and progress through the interview
- When you return to the Status of your state returns screen click Add another State and choose Maryland
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