Shares Traded for Taxes Withheld

Hello,

 

I've entered my RSU information, including cost basis, date acquired and sold. At the end of my Review, I get to a page that asks for Shares Traded for Taxes Withheld. I can't figure out where to see this information. I've looked at my transaction (Fidelity) and my 1099B but don't see that specified anywhere. Where would I find this?