In order to transfer your 2019 data to 2020 you have to be using the exact same account and exactly the same user ID; you must perform the transfer before you enter any other data.
Customer support opens at 5 a.m. Pacific time, by the way, and you posted this in the middle of the night.
To call TurboTax customer support
https://ttlc.intuit.com/questions/1899263-what-is-the-turbotax-phone-number
They are available from 5 a.m. to 5 p.m. Pacific time Monday-Friday
How to transfer last year’s return? https://ttlc.intuit.com/questions/1900883