A Stamped Schedule 1 is the result of filing the Form 2290 that shows the return has been filed and paid. This document is required when tagging or registering vehicles with a taxable gross weight over 55,000 pounds to show proof of filing the 2290.
When e-filing, an e-file watermark and received date serves as the paid stamp and is the official IRS copy.
E-Filing the Form 2290 through the IRS approved E-File provider - ExpressTruckTax allows this Schedule 1 to be emailed as soon as the return is accepted by the IRS. This is typically within 5-10 minutes.