Proof of payment for state registration
Generally, states will require verification of payment of the tax for any taxable vehicle before they will register the vehicle.
Use the stamped copy of Schedule 1 as proof of payment when:
* Registering vehicles with the state, or
* Entering a Canadian or Mexican vehicle into the United States.
If you do not have the stamped copy, you may use a photocopy of Form 2290, Schedule 1, and both sides of your canceled check as proof of payment.
IRS stamped Schedule 1 copy:
In efiling service the Schedule 1 copy will have IRS efile watermark, with received date. This is the valid Schedule1 copy from IRS and accepted across states for registration and proof of payment.
In paper return the schedule 1 copy will be stamped as paid by IRS.