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-s...
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-softw...
