State tax filing

If I understand correctly, you are saying that I should be able to claim credit for taxes paid to PA in DE tax return even if I file a non-resident tax return in DE. Is that right ? 

 

1. If yes, where do I get information for AGI for PA, PA income while being a resident of DE etc. 

2. The other issue is that I tried the option of filing as a resident of DE. Even after applying PA credit ( which TT does automatically), I am owing to DE. However, if I file as non-resident return for DE, I get money back even without claiming any credit for taxes paid to PA. I had income from NY when I wasn't residing in DE.