What do you want to upload? From where to where? Your tax returns or download the program? Did you buy the CD or the download?
To download the programs. Access your downloads here
https://shop.turbotax.intuit.com/commerce/account/secure/login.jsp?pagecontext=download
If you can't find your download, use this TurboTax account recovery website to get a list of user ID's for an email address. Run the tool against any email addresses you may have used https://myturbotax.intuit.com/account-recovery/
If you are an Advantage subscriber sign onto your Advantage account to download
https://accounts-tax.intuit.com/turbotaxadvantage