The Department will grant an extension of time to file a PA income tax return up to six months. The Pennsylvania Department of Revenue will grant up to a six-month extension of time for filing a Pennsylvania income tax return upon request.The department offers four ways to request an extension of time to file a Pennsylvania tax return. Use the PAExt screen to complete Form REV-276. You can either have UltraTax CS calculate the payment amount, or manually force it. This gives you until October 15 to file without penalties. A Pennsylvania tax extension grants a 6 months extension from the original tax due date. When to file a PA Tax Extension? Form 4868 is used to apply for an extension of time to file your U.S. individual income tax return. Complete Form 4868 to use as a worksheet.