@CarissaM and @KarenM90
There are at least THREE discussion threads (shown below) on this same issue, with the earliest beginning on Feb 10, and including state returns for Indiana, Illinois, Kansas, Louisiana, Michigan, New Jersey, New York, and Oklahoma. This issue is clearly a problem with the TurboTax software.
State return won't transmit e-file (started Feb 10)
https://ttlc.intuit.com/community/state-taxes/discussion/state-return-won-t-transmit-e-file/00/11258...
Indiana state return won't transmit (started Mar 15)
https://ttlc.intuit.com/community/state-taxes/discussion/ind[product key removed]n-won-t-transmit/00...
Can't efile state (Indiana) using download Turbotax Deluxe (started Mar 17)
https://ttlc.intuit.com/community/taxes/discussion/can-t-e[product key removed]na-using-download-tur...
Note also that "If your tax return can't be e-filed for some reason, TurboTax will let you know."
https://ttlc.intuit.com/community/e-file/help/e-filing-problems/00/26104
