Form ST-556-D-X, Amended Nontaxable Sales for Resale of Previously Rented or Leased Vehicles, must be filed electronically using MyTax Illinois, our free online account management program. If you are already registered to file Form ST-556, you are also registered to file Form ST-556-D. If you have not already done so, you will need to activate your account by clicking "Sign up Now!" at mytax.illinois.gov.
Click here to go to MyTax Illinois to file your return online