IRS needs two copies of schedule 1. This needs to be duly filled and submitted to the IRS along with the filled in copy of the Form 2290 while filing. The IRS will stamp one copy and return to you for use as proof of payment when registering vehicle(s) with a state. After e-filing the Form 2290 along with the schedule of Heavy Highway vehicles, IRS will digitally watermark one of the schedule 1 and that will be sent back to be used as a proof of HVUT payment.
If you want a copy of a prior-period Schedule 1 returned, you must send a written request to:
Department of the Treasury
Internal Revenue Service
Cincinnati, OH 45999-0031