You have to file each year separately. So you will need 4 programs. You can only do 2020 personal return online. You will have to buy the other desktop programs.
FOR PARTNERSHIP RETURNS
The small business program (TT Business) is for 1120 Corporation, 1120S Corp, 1065 Partnership or 1041 Estate/Trust returns and will not do your personal 1040 return. It is a separate program from the Desktop Home & Business program or the Online Self Employed version.
Home & Business (or Self Employed) is for personal returns that include a schedule C for self employment or sole proprietor. A single owner LLC would be reported on Schedule C unless the LLC elected to be treated as an S corp or C corp.
You will get a schedule K-1 (or a W2) from the business return to manually enter into your personal 1040 return.
Turbo Tax Business is not available to do online or on a Mac. You can buy the Window version here. And you can have both TT Business and TT Home & Business (or any personal version) installed on your computer at the same time.
https://turbotax.intuit.com/small-business-taxes
You can buy prior year Business programs here (last one on the right).
https://turbotax.intuit.com/personal-taxes/past-years-products
Window System Requirements
https://ttlc.intuit.com/community/system-requirements/help/minimum-system-requirements-for-turbotax-...
FOR PERSONAL RETURNS
For 2020 you can use the Online version or buy the CD/Download Desktop program.
You can start an Online return here,
https://turbotax.intuit.com/personal-taxes/online
You can see the Desktop programs here,
https://turbotax.intuit.com/personal-taxes/cd-download
FOR 2019 PERSONAL
To do a prior year return you have to buy the Desktop program here,
https://turbotax.intuit.com/personal-taxes/past-years-products
