You can check online at: "Where's My Refund", http://www.doreservices.state.pa.us/Individual/Refund
You will need the primary social security number on the return, and the amount of refund requested. This is available 24 hours a day. Or, contact the Department's Taxpayer Service & Information Center at 717-787-8201 to speak to a representative from 7:30 a.m. to 5 p.m. Contact one of the District Offices.