Standard deduction applied to state return?

[anonymous2]

Just want to make sure this is correct. 

1. Part year resident of both UT and AZ

2. on my AZ return it applies Standard Deduction to reduce my taxable income

Federal Adjusted Gross income =100,000

AZ sourced income = 40000

Less: Standard deduction 15750

3. I dont remember the same calculation done for my UT return

Just want to make sure this is correct either way

a. SD is correctly applied to AZ in this case

b. I don't need to go to UT state filing and remove SD amount from the income I made while in UT

[anonymous2 · Accepted solution]

2025 Arizona Standard Deduction Amounts Adjusted · $ 15,750 

AZ apparently has its own deduction that is applied to income earned while in AZ.

[MaryK4]

Yes, the standard deduction is applied to each part year return- each state handles the deductions differently due to their unique tax structures.

The standard deduction is applied to your Arizona part-year resident return-  but Arizona typically calculates tax by starting with your total income and then multiplying the tax by a "proration ratio" (Arizona income divided by total income) or applying the deduction to the Arizona-specific portion.

For part-year residents, Utah often requires you to prorate or calculate a specific deduction based on Utah-sourced income. Utah uses a Taxpayer Tax Credit instead of a direct deduction from income.  Utah calculates your tax at a flat rate on your taxable income first. It then applies a non-refundable credit equal to roughly 6% of your federal standard deduction and personal exemptions.

TurboTax does the calculations behind the scenes based on how the state requires it to be reported.