If the S Corp income and the interest income are both on your PA return, the question now is whether the amounts reported as PA income on that PA tax return differ from what is on your PA K-1. If the amounts in the PA nonresident return are the same as the PA K-1, nothing further is needed. If the "PA income" amounts differ between the PA nonresident return and the PA K-1, you'll need to change the amounts to the PA K-1 amounts.
If the interest income isn't yet on your PA return as interest income, there should be a place on an allocation screen (in your PA interview questions) to report how much of your total federal interest income is "PA sourced".
In the end, the PA nonresident return should tax the income from the PA K-1 (assuming that is your only PA source income), and if NY taxes that same income, you should receive a credit from NY for the tax paid in PA.
If this doesn't answer your question, please provide additional details.
**Say "Thanks" by clicking the thumb icon in a post
**Mark the post that answers your question by clicking on "Mark as Best Answer"
