Married filing jointly and our income situation has not changed much in the past few years - we never owe, and this year we do. How do I find out why?

[newusernameagain]

You should be able to pull up a year to year comparison tax summary if you used Turbotax last year. This would help understand what income changed. Is it possible you withheld less in taxes?

This old post might help find that screen:

[MindyB]

As @newusernameagain mentions, a great place to start is the comparison.

What to compare first:

• Withholding vs. tax: Your total federal withholding may have dropped or your total tax increased. Check 1040 line 25 (withholding) vs. line 24 (total tax).
• Credits: Child Tax Credit, education credits, Premium Tax Credit, EV/home energy credits, if any credits reduced or where only in 2024, that would cause the difference.
• Deductions: A decrease in state and local tax, mortgage interest, charity, etc. can reduce deductions.
• Income items: 1099-INT/DIV, capital gains, RSUs, RMDs, unemployment, side-gig/rental, if there was an increase, this would increase tax and can phase out credits.
• Withholding changes: New jobs, bonuses, or W-4 updates often reduce withholding.