1 Enter the amount you wish to donate to each of the following voluntary charitable donation funds. You may contribute any whole-dollar.The following forms should be used when registering a charity or professional fund-raising organization with the Illinois Attorney General's Office. To apply for tax-exempt status, your organization will need to either complete Form 1023 or Form 1024. Go to: MyTax.Illinois. The due date for filing your 2023 Form IL-1040 and paying any tax you owe is April 15, 2024. Click 'Submit' and enter and confirm your email address; then click 'OK' to submit and receive your confirmation. Log on to mytax.illinois. Gov to REQUEST LETTER ID If you already have an account, enter your username and password to verify. Simply fill out the EFT Authorization Form.