According to the Utah State Tax Commission (http://incometax.utah.gov/credits/renewable-energy-systems) You can get Form TC-40E, Renewable Residential and Commercial Energy Systems Tax Credits, from the Governor's Office of Energy Development with their certification stamp. Do not send form TC-40E with your return. Keep the form and all related documents with your records.
The credit is claimed by entering the allowable credit on Utah TC-40A, Part 5, using code 39. To enter it in TurboTax please see the instructions below:
In the TurboTax Utah interview, get to the screen titled Let's Check for Utah Credits, Page 2 of 2
In that list is Received a pre-approved credit from the state. Click the Yes button.
On the next screen drop-down list for Credit Description, select Renewable residential energy systems and enter the amount.
Please feel free to post any additional details or questions in the comment section.
The amount entered, is it the whole amount you paid for the system or the amount of tax credit giving by the State of Utah?