However, for the fourth quarter of 2024 the account number should be an 11-digit alphanumeric account number due to a change in 529 account custodianship. This applies to all Illinois filers who made contributions in the fourth quarter of 2024.
See guidance located here:
https://brightstart.com/media/3vdllpew/2024-important-tax-information.pdf
My question - Is mailing my Illinois state return the only option for filing?
Thank you
