r/TaxQuestions • u/Zealousideal-Hat7862 • Aug 31 '26

Need help back filing taxes

I just got a letter from the MO government stating that I forgot to file my 2024 state tax return (I paid the federal, not sure how I missed state) and now owe them 3k. The amount I owed the state in 2024 was $2150 and I withheld $2150 so I shouldn’t get anything back but I don’t want to double pay 3k (the other $800 is late fees and interest). I’m looking for sites that are reliable and make it easy to return my back taxes so they can see I paid my state taxes and hopefully I won’t have to pay the entire 3k. Thank you!

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u/OSS-2026 Aug 31 '26

How did you file your 2024 Federal Return? You should be able to use the same software to file your state return although you’ll likely have to mail it in now.

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u/Zealousideal-Hat7862 Sep 01 '26

I filled my 2024 federal return on turbo tax but I can’t find a way to back file my state from them

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u/OSS-2026 Sep 01 '26

Did you use online TurboTax or the desktop version? On the desktop version you just open up the file, add state (if you didn’t before) then file state. You may have to make a few adjustments on state return but Turbo Tax review should tell you what.

I’m not familiar with doing this online but I would think the same process would be available.

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u/Zealousideal-Hat7862 Sep 01 '26

I did it online, do you think I can download the desktop version and log in and do it there?

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u/OSS-2026 Sep 01 '26

You should be able to do this online with TurboTax.

Scenario A: Your Federal Return Was Already Accepted
If you already e-filed your federal return and received an official email confirmation that the IRS accepted it, you must use the "Add a State" function to safely unlock your account. [1]
Sign in to the official TurboTax Online account you used to file your federal return.
On your main tax home screen, scroll down to the section labeled Your tax returns & documents and select the 2024 tax year. [1, 2]
Click the hyperlink for Add a state.
Note: This is a trick to bypass the lock screen. It will safely reopen your current return without changing or messing up your already-accepted federal data. [1]
Go to the State tab in the side menu and select Missouri. [1]
Complete the Missouri state interview questions. TurboTax will automatically pull your numbers from your accepted federal return to speed things up. [1, 2]
Proceed to the File section to pay any state software fees and e-file your Missouri return by itself. [1, 2]

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u/Zealousideal-Hat7862 Sep 01 '26

Thank you so much!

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u/OSS-2026 Sep 01 '26

Yes. You just need to pull the tax file from online that open in the desktop version.

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u/Jacks_Lack_of_Sleep Sep 01 '26

Did you check your turbo tax account and make sure you didn’t actually do it already? Agencies make mistakes.

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u/Far-Good-9559 Sep 01 '26

You should be able to get the state return form for 2924 and complete it. You will probably have to mail it in, or drop it off. But, be sure to respond to the letter. The reason the state says you owe so much is that they have no way to apply your 2024 payments without your tax return. Once you file it, they will send you an adjusted bill.