I filed tax returns (Federal, California, Ohio) using turbotax in 2021. I now received a mail from Ohio department of taxation that I owed about $650.

[zterii]

In 2021, I moved from Ohio to California. I had a short employment in Ohio, and then started a new job in California. I used TurboTax to filed state tax for both states based on the W-2 of the corresponding employment. I don't know what went wrong. And how can I get in touch with TurboTax customer service to help?

[xmasbaby0]

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/

[Hal_Al]

The notice from the ODT (Ohio Dept. of Taxation) usually explains the reason for the tax bill.  For that much tax, it sounds like they calculated tax on your whole year income.  Check to see that TurboTax did the  nonresident credit allocation form.. IT NRC

https://tax.ohio.gov/static/forms/ohio_individual/generic/PIT_ITNRC.pdf

Look carefully.  Ohio also has City income tax and School District Income tax.  The bill may have been for one of those; although $650 seems like too much for "short employment in Ohio".