jbsutton12@gmail 

"...doesn't this fall on you?"

TurboTax does not receive copies of letters sent to you by the IRS, so no one at TurboTax knows about the cp49 letter that you received.

You used TurboTax for your 2020 return and received a refund.   You do not mention preparing or filing a 2021 tax return.   Now the IRS has seized your 2022 refund---apparently for tax you owed.   When you used TT for your 2020 return--was there any income you forgot to enter?  TurboTax does not and cannot check against outside sources to see if you have entered all of your income or whether you entered it correctly and completely.  But your income is reported to the IRS by the outside sources such as employers, clients, financial institutions, Social Security, etc.   If your income was reported incompletely or incorrectly, the IRS may discover the discrepancy and say you owe tax and interest on the unreported income.   

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/