Erroneous computation of Yaxes owed?

[Pistol2173]

I have used Turbotax since at least the early 1990's.  I have faithfully trusted Intuits Turbotax accuracy to prepare, compute, and file my federal and state taxes.  I have been pleased with the product for most of the past 30 years; however, the past 2 years (2020 &2021), I have been presented with a VA State tax bill post filing using Turbotax (2020 approx $78 & 2021 approx $32)!  Why has turbotax miscalculated my taxes?

[xmasbaby0]

No one else can see your tax returns, so we do not know if there was a miscalculation or if there was some sort of error in the state data entered when your tax return was prepared.

I RECEIVED A LETTER FROM THE IRS/STATE

TurboTax does not receive any information from the IRS or your state after your return was filed, so no one at TurboTax knows about a letter you received from the IRS or the state.

(what the letters from the IRS mean)

I GOT A LETTER FROM THE IRS   

https://ttlc.intuit.com/questions/3605673-i-got-a-letter-or-notice-from-the-irs

I AM BEING AUDITED

If you purchased Audit Defense:

https://ttlc.intuit.com/questions/2924451-i-bought-max-or-audit-defense-and-now-i-m-being-audited

AUDIT SUPPORT

TurboTax has a special phone number for help with IRS/state tax letters, which will be easier than going through regular Customer Support.   At the page below, click on the blue button that says "Get Help from TurboTax Support".  Then it will ask you what tax year is your letter.  Then it will ask you what the letter concerns. Then it will show you the phone number during posted business hours.

https://support.turbotax.intuit.com/irs-notice/audit-support/

[Mike9241]

haven't seen posts from other VA users so more likely it's something you're doing or not doing rather than a calculation error. what do the notices say? if it isn't clear what the issue is, call the VA department of revenue. then you may be able to prevent any penalties in 2022.

[SweetieJean]

Are you sure that those amounts aren't for penalties and/or interest on underpayment of estimated taxes?  If you owe more than $150 to the state of Virginia at the end of the tax year, you may be subject to pay underestimated tax.

[Pistol2173]

I just found out the additional taxes are indeed a penalty  (760C) for under withholding. 

[fanfare]

@Pistol2173 

TurboTax is supposed to calculate under-withholding penalties for you.