Filing your Utah state income tax return applies if the taxpayer was a full-year resident of Utah. A full-year resident must file Form TC-40 for that particular tax year and is required to file a federal individual income tax return for that tax year. The tax payer is considered to be domiciled, who is domiciled in Utah for any period of time during the tax year, but only for the duration of that period. An individual domiciled outside Utah is considered a Utah resident if the tax payer spent more than 183 days in Utah. The individual must file on or before the due date which is April 15 of the tax year if the due date falls on a Saturday, Sunday, or legal holiday, the due date is moved to the next business day.


If the taxpayer was a part-year resident of Utah they must file tax return for that particular tax year. If the resident is resided for only part of the year. The tax payer will be taxed on all income they earned while they were a resident.


If the taxpayer was a full year non-resident of Utah for that particular tax year. All income received during the period of residency will be taxable in Utah, regardless of where the income is earned from unless specifically exempted. Income from Utah sources is taxable in Utah during the period of non-residency.

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