US W2 - What PDBA settings control whether it gets put into Box 1 of W2?

Trying to reconcile W2 totals. How does the system determine which Pay Types and DBAs go into Box 1 of the W2? Trying to make sure we account for the all the YTD PDBA Totals in that box since there is no mapping to control it, want to be clear on knowing the Pay Types setting (ie. "Adds to Gross" Only or must be "Adds to Gross" & "Adds To Net"?) and for DBAs is it only where "Effect on Gross/Net Pay" = 2 (Cash Taxable) or a 3 (non-cash Taxable)?

Thank You!