Whether you file for an extension with the IRS or State, the extension for time to file is 6 months from the date the State return is due. The Pennsylvania Department of Revenue will grant up to a six-month extension of time for filing a Pennsylvania income tax return upon request.This form can be completed using Keystone's e-file. You can specifically request a state extension using Pennsylvania Form REV-276 (Application for Extension of Time to File). You must also submit this form for an extension of time to file a PA-40NRC or PA-40NRC-AE, as a request for federal extension cannot be filed for these returns. A Pennsylvania tax extension grants a 6 months extension from the original tax due date. When to file a PA Tax Extension?