Hi @Toben ,
You are correct, unfortunately you cannot use Turbo Tax Online for years 2019 and prior.
Follow this link to purchase desktop software from 2019, 2018, and 2017.
Even though forms change year to year you can always reach out to a tax expert while you work on these returns with specific questions! The interview process should handle the residency questions once you provide all the information, dates of residency, etc.
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