As a realtor, I often rebate part of my commission to buyers. My 1099 is for the income I received (after deducting the rebate).Can I still claim the rebate on my taxes?

For example, if I received $4050 in commission but rebated $1050 toward buyers closing costs (disclosed on settlement statement), I only got a check for $3000 at closing.  The $3000 was the only amount included on my 1099.  Can I still claim the $1050 as a rebate?