This doesn't seem to be true.
From the Iowa website https://tax.iowa.gov/amending-tax-returns :
Paper filed amended returns may take six months or more to process.
To Amend Electronically
Designate the return as “amended” and attach an IA 102 Amended Return Schedule.
Check with your software vendor regarding the ability to file prior year amended returns electronically.
Is it confirmed Turbotax is not able to support the above?
