Does Utah have Jurisdiction for your divorce?
The court may decree a dissolution of the marriage contract between the petitioner and respondent where the petitioner or respondent has been an actual and bona fide resident for 3 months of this state and of the county where the action is brought.
If you have minor children living with your spouse in another state for over six months then you should consider filing in that state as that court has jurisdiction over the children. Your spouse can waive that jurisdiction in writing.
You should file the divorce in the county where you presently reside, or in the County where your spouse resides, if she lives in another County. You or your spouse must have an Utah address in the county where you are filing your divorce. Utah civilian residents living overseas may file in Utah if they have maintained their residency in Utah.