If you look at the Sched C,E,F lines noted in the Link...... each line is the Wages line for that form.   That line on the form says to enter wages less employment credits.    So the same should apply on Form 1120S.  In fact Form 1120S, page 1, line 8  say Salaries and wages less employment credits.  The Smart Worksheet for Line 8 has line F to enter "Other credits".    If you report wages on Form 1125-A = Cost of labor,  I would follow the same guidance as line 8 from page 1.

Hope this helps.