If the rental LLC is a single owner entity, you do not need to file a PA business return. However, you do need to file a PA non-resident personal return reporting only the rental income and expenses.
Prepare federal first.
Then prepare the PA non-resident return reporting only the rental activities.
And finally prepare your NY resident return reporting ALL income, even that reported to PA. Be sure the return contains a credit for taxes paid to another state if you owe PA income taxes for 2017.
