Please see this TurboTax Help Article for instructions on how to download a prior year Tax Return with Government and TurboTax Worksheets: How do I view, download, or print a prior-year tax return?
Unfortunately that help article only gives instructions on how to download a prior year tax return, but excludes steps to retrieve the supporting worksheets.
In order to print more than the Tax Returns and Filing Instructions for a prior year in TurboTax Online, you will need to take some extra steps: