You can only file 2024 and the last 3 years with Turbo Tax. 2024 is the current year we are filing now and you can use either the Online web version or the Desktop Download Program. For 2021-2023 you need to use the Desktop propram.
To do a prior year return you have to buy the Desktop program here,
https://turbotax.intuit.com/personal-taxes/past-years-products
You will need a full Windows or Mac to install it on.
