total of payments and withholdings

I am trying to figure out how the box for "total of all your payments and withholdings" under Personal income- refund is populated. I applied my 2020 return to 2021 and made 3 estimated tax payments in 2021.  Those figures along with the w-2 state and local withholdings is not the same as the amount as the populated box.  

If I pull up the "tax payments" worksheet those figures are all listed on the form and total $1323 more than what is being populated in the box.  Is something being deducted from that box? Where can I find what is included in that calculation?

thanks!