How did you erase 2020? You can try to transfer it again. To transfer again in the Online version, you have to clear and start over
https://ttlc.intuit.com/community/using-turbotax/help/how-do-i-clear-and-start-over-in-turbotax-onli...
Or you don't need to transfer from 2020. Are you having trouble doing 2021? Have you already started? It is too late to start a 2021 return. You need to Buy the 2021 program here
TurboTax® 2021 Tax Software for Filing Past Years’ Taxes, Prior Year Tax Preparation
Or use IRS Free File
IRS Free File | Internal Revenue Service
