.need to move a w-2 to a schedule c which I did. But it won’t let me add expenses. How can I change to the self employment turbo so I can add expenses for the 2023 year ?

You need to add expenses to your 2023 return?  You need to amend 2023.  Being that you need to use the Desktop program you won’t need to upgrade to a higher version.

How to Amend a prior year

https://ttlc.intuit.com/community/amending/help/how-to-amend-change-or-correct-a-return-you-already-filed/00/25588

You can't move your W-2 to a Schedule C.  When you have income from a W-2 it's because you're an employee and you don't get to deduct expenses from your W-2 income on your federal return. 

You complete Schedule C when you're self-employed or as an independent contractor and you are allowed to deduct your expenses from that income.  

Review the TurboTax article Am I an employee or an independent contractor? for more information.

are you a statutory employee? if so the box on the w-2 needs to be checked on the official w-2 you got