See this TurboTax support FAQ for finding the download when using Windows - https://ttlc.intuit.com/turbotax-support/en-us/help-article/product-delivery/find-turbotax-windows-software-download/L1zwlyyvc_US_en_US?uid=lt38nca1
See this TurboTax support FAQ for finding the download when using a Mac - https://ttlc.intuit.com/turbotax-support/en-us/help-article/product-delivery/find-turbotax-mac-software-download/L6RTW5hbF_US_en_US?uid=lt38onmg