No one can see your tax return. The state does not provide any information to TurboTax after you file. If the state needs you to verify your identity then follow the state's instructions to do so. It is not uncommon for states to implement additional fraud prevention measures. Only the state can tell you what they are changing on your return.
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.
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/