Hello,
For tax year 2025, I had a lot of additional income from an out-of-state summer internship that was not subject to withholding in GA. I made an estimated tax payment on 6/16/2025 (1 day late, I know) and another one on 9/15/2025.
From my understanding, under the safe harbor rule, I should incur no penalty if I made quarterly payments on time that meet or exceed my 2024 tax. If it matters, in 2024 my filing status was single, this year it will be married filing jointly.
In 2024, my tax was $1,630.
My cumulative tax payments to GA (withholding and estimated payments) from 1/1/2025 to the respective quarterly deadlines:
4/15/2025: $318
6/15/2025: $442
9/15/2025: $2,673
4/15/2026: $3,172
My total GA tax for 2025 is $3,376. I can also claim around $961 in taxes paid to my internship state, so I would actually be due a refund of over $500. My problem is that TurboTax is claiming that I owe an underpayment penalty to GA in the amount of $84. Does this seem accurate? It seems to me that had I made my June estimated payment on time (1 day earlier), I should have been able to avoid this entirely. How does TurboTax arrive at this value?
Thank you very much in advance!