Sole Member S corp LLC - Payroll tax question

Hi sorry to bother but this is my first year as an S Corp and just realized its not as straight forward as I thought.  My service company gets paid via 1099s from the companies that hire me.  My company then pay me via a W2.  When filing for my company it asks me for my payroll taxes under compensation and benefits - I'm having difficulty understanding what the payroll taxes are exactly and am worried I might do this wrong.  Is it the taxes withheld on my W2?  If not what are my payroll taxes and where can I find them?