I already have Turbo Tax deluxe I am trying to download and use Turbotax Home and Business. It's not working what am i doing wrong.

Why are you trying to do that?  You cannot download/install two versions of 2024 desktop software on the same computer.   You can, however, upgrade the Deluxe version you already have to Home and Business if you want the extra help you might get from the interview screens in Home and Business.    All versions of the desktop download have all of the forms and all of the schedules.   

Just upgrade to Home and Business--you will pay the difference between the price of Deluxe and the price of H & B.   I have a Mac--so not sure if it looks different on Windows----on the top of your TT screen where the tools are---look for this >> on the far right---click that and you will get a menu to upgrade.

Seek a refund if you purchased Home and Business unnecessarily:

To request a refund for a TT product

https://ttlc.intuit.com/turbotax-support/en-us/help-article/intuit-refunds/request-refund-turbotax-product/L834M6uyW_US_en_US?uid=m6meybc2

@Logan3321     Here's how to activate a different version. There is a way to have 2 licenses. You don't need to install the second version just enter the License Code. Under Help - Switch Product - Activate new product. Don't know what that will do or what benefit you will get. Don't think it will allow you to efile more than 5 or get a different free state program download.  

But you only needed to buy 1 version. The Desktop program can do unlimited returns and efile 5 for free. And All the Desktop programs have the same forms. You just get more help and guidance in the higher versions.  I would get a refund for the Home & Business version.