See this TurboTax support FAQ if your license code is not working - https://ttlc.intuit.com/community/tax-topics/help/my-code-doesn-t-work/01/871966

For a license code issue please contact TurboTax Support by phone during business hours 5AM-5PM Pacific (8AM-8PM Eastern) Monday-Friday.   (Closed this Thursday and Friday due to Thanksgiving.)