If you live in Utah, you would file as a resident of that State, even though your contract takes you to Idaho. You should also indicate your military status as "National Guard" to bring up additional questions, including all states where you served.
As a member of the National Guard, you may deduct your travel costs. See the post below for more info:
https://ttlc.intuit.com/replies/5714230
If you need additional assistance with National Guard deductions, please post a new question in the support forum.
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