- 1 IRS Office Altoona
- 2 IRS Office Bethlehem
- 3 IRS Office Cranberry
- 4 IRS Office Erie
- 5 IRS Office Harrisburg
- 6 IRS Office Horsham
- 7 IRS Office Johnstown
- 8 IRS Office King of Prussia
- 9 IRS Office Lancaster
- 10 IRS Office Media
- 11 IRS Office Monroeville
- 12 IRS Office Philadelphia
- 13 IRS Office Pittsburgh
- 14 IRS Office Reading
- 15 IRS Office Scranton
