The Pennsylvania Application For Refund is an official form used by Pennsylvania taxpayers to request a refund of state taxes. It is a multi-purpose form used for both individual and business refunds. It is submitted to the Pennsylvania Department of Revenue. There are two types of Pennsylvania Applications for Refund: 1. Form REV-181 — Pennsylvania Application for Refund of Sales and Use Tax: This form is used by individuals and businesses to request a refund of sales taxes they have paid on purchases. 2. Form REV-419 — Pennsylvania Application for Refund of Personal Income Tax: This form is used by individuals to request a refund of personal income taxes they have paid to the state.