Pennsylvania REV-1647 Instructions — Instructions for REV-1647 Schedule — - Future Interest Compromise is a form that Pennsylvania taxpayers use to report and pay tax on any future interest compromise. The form is divided into four parts: Part 1 — Taxpayer Information, Part 2 – Interest Compromise Information, Part 3 — Payment Information, and Part 4 – Signature. Part — – Taxpayer Information requires the taxpayer to provide their name, address, Social Security number, telephone number, and the tax year of the return. Part 2 — Interest Compromise Information requires the taxpayer to provide details of the future interest compromise, including the date of the compromise, the amount of the compromise, the total future interest due, and the amount of future interest waived. Part 3 — Payment Information requires the taxpayer to provide the amount of the compromise that will be paid with the return, as well as the payment method. Part 4 — Signature requires the taxpayer to sign and date the return. There are two types of Pennsylvania REV-1647 Instructions — Instructions for REV-1647 Schedule — - Future Interest Compromise: Form REV-1647, which is used to report and pay tax on any future interest compromise, and Form REV-1647A, which is used to report and pay tax on any interest compromise related to a delinquent return.