If the IRS requested that you verify your identity and you did not follow through and provide proof ---that is why you did not receive your refund. Until you follow their instructions, you will not receive it. Call the IRS to see what they still need from you. TurboTax cannot help you with this. This is between you and the IRS.
Sometimes the IRS chooses returns randomly to request verification of identity and sometimes there is something on the return that triggers the request. No matter why the IRS has required you to verify your identity, you need to follow their instructions in order to receive your refund. If you do not verify your identity you will not get your refund.
https://turbotax.intuit.com/tax-tips/security/tips-for-handling-identity-verification-requests-from-...
https://www.irs.gov/identity-theft-fraud-scams/identity-verification-for-irs-letter-recipients
To call the IRS:IRS: 800-829-1040 hours 7 AM - 7 PM local time Mon-Fri
Listen to each menu before making the selection.
First choose your language. Press 1 for English.
Then do NOT choose the first choice re: "Refund", or it will send you to an automated phone line.
Instead, press 2 for "personal income tax".
Then press 1 for "form, tax history, or payment".
Then press 3 "for all other questions."
Then press 2 "for all other questions." It should then transfer you to an agent.
**Disclaimer: Every effort has been made to offer the most correct information possible. The poster disclaims any legal responsibility for the accuracy of the information that is contained in this post.**
