Contributions to a 529 plan are not tax deductible. However, the withdrawals are tax free.
The Utah tax credit is 5% of the maximum qualifying contribution of 3,840 dollars per beneficiary (for joint filers) or a maximum credit of 192 dollars. See the explanation below and here at https://uesp.org/why-choose-uesp/tax-advantages/ :
For the 2017 tax year, a Utah individual taxpayer (or trust) who is a UESP account owner may claim a 5 percent Utah state income tax credit up to certain limits on contributions to his or her account or accounts. Utah-based corporations may claim a state income tax deduction up to certain limits. The maximum credit and deduction are reviewed each year and may be changed.
To claim the tax credit or deduction:
The beneficiary must be younger than age 19 when designated on the account.
If the beneficiary is younger than age 19 when designated, the account owner can claim the credit each year a contribution is made for the life of the account.
