Go to the Utah state interview in TurboTax.
Proceed through the interview until you come to a screen with the title of "Let's Check for Other Utah Credits".
Click "yes".
On the next screen that asks for Credit Description and Amount, use "Renewable residential energy system" for the credit description. Put the carryover in the amount field.
After this, check your return to see if all the solar credit was taken, in case this generated an additional carryover (you have 4 years available after the initial purchase).
