Your narrative is a bit confusing.... rather than comparing 22 and 23 try just listing basic facts for this year

TP  -  status  age  ;  w2 income   - Sch C net income     custodial parent for child no 1,2..... 

Child no 1     age   college?   etc...

Child 2

Like @TaxGuyBill  says...pub 596 is your friend...  PS does an excellent job of calculating the credits if you get your facts straight and entered correctly. .