For tax year 2021 you have to purchase the 2021 TurboTax software from this website - https://turbotax.intuit.com/personal-taxes/past-years-products/
Download and install the 2021 program. Start the program and then click on the File menu at the top left of the program screen. Click on Open Tax Return. Browse to the location where you download the tax data file for 2021 from the online edition.
See this TurboTax support FAQ for completing a tax return originally started with the online editions - https://ttlc.intuit.com/turbotax-support/en-us/help-article/printers-printing/finish-prior-year-retu...
