You could, or just leave the leading A off the Account Number entry on Schedule M.
If your Illinois State Return ultimately rejects because of this account number, then you definitely should leave the A out. It doesn't appear that IL tax forms have been updated for the change, as I could not find 2024 Schedule M instructions.
Here's How to Contact your State Dept of Revenue for more info.
**Say "Thanks" by clicking the thumb icon in a post
**Mark the post that answers your question by clicking on "Mark as Best Answer"
