My Illinois state taxes said they need to be mailed in because I'm filing for the first time in that state. However the tax payment voucher I printed from turbo tax with

[ashleys051]

So I paid the amount owed but do I still need to mail in a tax return.  Since I paid my state taxes owed on the Illinois website?

[CalCountry]

Why do you believe you must file by mail for your first time filing of an Illinois state tax return?  There are a few restrictions about e-filing shown in the citation below.

See the provisions for e-filing from the Illinois Department of Revenue at:
   http://tax.illinois.gov/Individuals/File/software.htm

" Eligibility :

You may file using Tax-Prep software if you (and your spouse, if filing jointly) have an IL-PIN or a valid Illinois drivers license or Illinois identification card on file with the Illinois Secretary of State.

You may not file electronically using Tax-Prep software if you:
  • are claiming the August 1, 1969, valuation limitation amount from Schedule F reported on Schedule M, Line 21,
  • are filing a return for a deceased taxpayer,
  • want to amend or correct a previously filed return,
  • claim recapture of investments tax credits from Schedule 4255 on IL-1040, Line 14, or
  • claim credit for tax paid to other states on IL-1040, Line 16 if you are not a full-year Illinois resident."