LEASE VEHICLE - Check block and complete Form MV-1L, if the vehicle is being leased. The monthly return form is available at the Tax Collector's Office, Allegheny County Courthouse,.Make sure you have a clear Vehicle Leasing Agreement. County Monthly Vehicle Usage Report. PA requires the lease to be closed inperson at a dealer whereas most states allow you to write a check to the kia finance company directly. A Pennsylvania vehicle bill of sale is a legal document formalizing the sale and purchase of a motor vehicle between a buyer and seller. In addition to your required documents, you will need to fill out a copy of the Permit Application. Download the Application. How to fill out the Motor Vehicle Lease Agreement Comprehensive Guide? Signing this document can help both parties to avoid disputes in the future.