2 days ago, I purchased 2023 Turbo Tax Deluxe, but I need 2023 Home & Business, how can I upgrade?

Did you install Deluxe yet?  There should be a button to upgrade it.  But you really don’t need to upgrade.   All the Desktop programs have the same forms. You just get more help and guidance in the higher versions.   Or do you need to file a separate Business return like a 1065 or 1120-S etc.?

Install TurboTax Deluxe and start a tax return. Then click the button at the very bottom of the TurboTax window, towards the right, that says "Upgrade TurboTax."