You do not access a 2021 tax data file transferred to the 2020 TurboTax online editions. The 2021 tax data is a transfer that provides your prior year tax data to the 2022 tax return.
See this TurboTax support FAQ for transferring prior year tax data to the current year TurboTax online editions - https://ttlc.intuit.com/turbotax-support/en-us/help-article/import-export-data-files/transfer-last-y...
