Turbotax has discontinued for all years prior to 2022 online preparation and e-filing as have other self-prepared tax return apps. you must purcase the desktop app full pc or MAC and then the return must be mailed in. you can buy from Intuit or other authorized sellers such as Amazon, Costco. etc. be wary of sites offering to sell at substantial discounts. you may end up with malware.
https://turbotax.intuit.com/personal-taxes/past-years-products
