You would file the credit when you file your taxes. In your case though your W2 from Texas should not show anything in state withholding. The money you earned while living in Texas also should not be taxed to Pennsylvania. While filing your 2023 return TurboTax will ask where you were living on 12/31/2023 which will be Pa. It will also ask if you lived or made money in another state. Both Texas and New Hampshire do not have a state income tax so there will be no credit from another state to deduct. Any income from New Hampshire will be claimed on your Pa return. You can ask the New Hampshire employer if they can take Pa state taxes out. If they can it will save you from owing 3.07% of that wage at tax time.
