Get your taxes done using TurboTax

My 2023 Turbotax CD, which supposedly has "nothing on it but a link to Turbotax. com" actually has 479 mb of data  on it.  Wow, thats a lot of data for a disk thats only purpose is to provide a link to Turbotax.com to download the tax program. Wonder if there could be additional support programs or updates required by some users' computers that is not already on their computer, (or maybe a basic version of the program itself)? Please explain.