I ran into similar issue when I filed and transmitted IL state tax with TurboTax 2019. My taxes were rejected twice and in both cases I verified all information before transmitting the taxes to IL state. In my case, this what it complained about,
"IL1040-9900-2 - Please review and correct the Secondary taxpayer's signature requirements. At least one of the following signature fields must be present and valid on the Dept. Of Revenue's file: IL PIN, Prior Year AGI, Drivers License or State ID Number. (Note: The State ID or Driver License must be current and from IL.)
IL1040-10500-3 - This return could not be processed for electronic filing by Illinois because of an issue related to one or more of the methods used to validate the signature. If Form IL1040 'Filing Status' is equal to Married Filing Joint, all of the following Secondary Taxpayer Driver's License signature fields must be entered exactly as shown on the Illinois Drivers License or State ID. Enter each field exactly as it is on your IL Drivers License or state ID: First Name, Middle Name, Last Name, Suffix (leave blank if necessary), and weight. You may not use an out-of-state or expired drivers license. If issues persist after making necessary corrections, you may need to print and mail your return."
To fix this issue, what I did was that I clicked on the "Forms" icon on the top right in the TurboTax application while reviewing my tax return application. It showed me actual tax forms. So, I went to IL State 1040 tax form and looked at mine and my spouse's driver license/state id info. I was surprised to see that it was partially filled for my spouse even though I made sure multiple times in the step by step guide before it transmitted our info. I entered my spouse's state id info correctly and saved the tax return application. I went back to the standard step by step guide mode and transmitted my taxes to IL State again. And this time, IL-state accepted my tax return.
I hope this helps.
