The Department will grant an extension of time to file a PA income tax return up to six months. Write the type of filer (PA-40, PA-40.This form can be completed using Keystone's e-file. Complete the primary SSN or EIN, check digit, spouse's SSN. (if applicable), payment amount, PA-40 NRC and type of return fields or ovals where indicated. Rule 237.6 - Form of Agreement to Extend Time. Form 4868 is used to apply for an extension of time to file your U.S. individual income tax return. Use this form for an extension of time to file a PA-40, PA-41 or. You'll receive an electronic acknowledgment once you.