What do I enter for 2023 withholding W-4?

I want to change my W-4 withholding, so I'm running through that form in TT.  At the beginning, it asks me for the wages I expect in 2023.  There is also a box to enter 2023 withholding.  I'm not sure what to enter there.  The whole point was to calculate what my new withholding should be.  So why is it asking me that here?  Should I just leave it blank?

 

Thanks.