Resident/Part Year Resident

Let's see if  @PATAX  can help you.   He might be taking Heidi for a walk this morning so may have to wait for a response.

I haven't had one like this I think in many years. I checked PA tax books and went online and there is not much information there. A colleague I believe just prepared something similar like this with PA and Ohio. I called him but he doesn't work usually on Sunday. I'll try to call him tomorrow if you can't get the answer. But I think @Skylane  may know the answer to that since there was a similar question recently. Just wait a little bit and we will help you.

All I know is what I read in the instructions. 

"If you are a PA resident who does not have any PA income (loss) to report, you do not have to file a PA tax return, even if married to a person who must file a PA tax return."

"You and your spouse have the option to file separate returns. However, you and your spouse must file separate returns if: . . .

6. One of you is a PA resident and the other is not. However, you can file jointly if you both elect to file as PA residents and meet all other requirements for filing jointly."

what a nice Sunday afternoon mess….

They file IT203 NY PY/NR as MFJ allocating only her income to NY (and showing dates of her residency. 
PA file MFJ and file credit for taxes paid to other jurisdictions (i forget the form number).

Check inst for IT203. The NY return will be partially affected by total family income but it should wash out claiming the COJ in PA. I don’t think she’s allowed to file NY as single.