Problem: The state of Illinois - not eFile.com - rejected your IL state tax return. On your IL Form on Step 1 you did not enter the correct or valid IL county name.
Solution: Sign into your eFile.com account: https://mytaxes.efile.com/1040/SignIn/, click State Taxes on the left green side and review your IL return. Enter the correct county name and continue with your re-eFile process. You can re-eFile your return at no additional charge.
Contact us with questions: https://www.efile.com/tax-service/contact/efile-contact/