The following links contain forms and instructions for Payroll, Federal, State and Local tax authorities:

Federal Tax Forms and Information

Internal Revenue Service
Understanding Your W-2  
How to Print a Copy of Your W-2
Reporting Unqualified Scholarships (This excludes non-resident aliens since they will receive a 1042-S form with their unqualified scholarship information summarized for them,)
Federal Form W-4 and Instructions

State Tax Forms and Information

Pennsylvania Department of Revenue

Local Tax Forms and Information

Capital Tax Collection Bureau
Certificate of Residency
LST Exemption and Refund Requests

Other Payroll Forms

Direct Deposit Form