When I e-filed both my federal return and PA state return at the same time, no signature form for PA was required because the PA file was linked to the federal file, which had an e-file PIN. My federal return was accepted, but my PA return was not. After fixing my PA return, I e-filed it again. This time Turbotax generated the signature form, PA-8453, because this e-file was not linked to my federal file with the PIN.
According to the instructions for this form, do NOT mail Form PA-8453 and attachments to the PA Department of Revenue unless requested. However, you must retain completed Forms PA-8453 and supporting documents for three years after the due date of the return or the date the return was
filed electronically, whichever is later.
