To file the amended return, print, sign and mail the corrected tax return and mail it to one of the following addresses:
If you owe additional tax:
PA DEPT OF REVENUE
PAYMENT ENCLOSED
1 REVENUE PLACE
HARRISBURG, PA 17129-0001
If you are due an additional refund:
PA DEPT OF REVENUE
REFUND OR CREDIT REQUESTED
3 REVENUE PLACE
HARRISBURG, PA 17129-0003
If you neither owe additional tax or aren't due an additional refund:
PA DEPT OF REVENUE
NO PAYMENT OR NO REFUND
2 REVENUE PLACE
HARRISBURG, PA 17129-0002
Additional information can be found, here.