You are referring to Form PA-8453 Pennsylvania Individual Income Tax Declaration for Electronic Filing. After e-filing your tax return, you do not need to mail in the form you do need to keep this form and the required attachments for 3 years. The form should be included in your tax file.
Here's how to access a complete copy of your tax return which includes all forms and worksheets:
You are referring to Form PA-8453 Pennsylvania Individual Income Tax Declaration for Electronic Filing. After e-filing your tax return, you do not need to mail in the form you do need to keep this form and the required attachments for 3 years. The form should be included in your tax file.
Here's how to access a complete copy of your tax return which includes all forms and worksheets: