What phone number are you referring to?
If you need to update your TurboTax account see this TurboTax support FAQ - https://ttlc.intuit.com/turbotax-support/en-us/help-article/account-status/update-turbotax-account-information/L0YoC0H31_US_en_US?uid=lqo2rrtj
If you are referring to the TurboTax support phone number, call 1-800-446-8848
What do you need to unblock? We can't see your screen.