double taxed!! Help!

I was paid by a legal firm to do a lawsuit review, but my current employer required me to give them (my employer) the money, then they paid me (minus taxes) in my next paycheck.  So I have a 1099-MISC for $2800, and TurboTax is calculating that I owe tax on that, but I wrote a check to my work for $2800 and they withheld taxes and I got a net of about $1600.  So how do I avoid paying double tax on TurboTax??

 

Thanks!