Help, Employer claiming I make more money than I actually do

I work as a server at a restaurant, it is pretty standard for servers to pay a percentage of sales back to the house for bus help and hostesses. The problem is that my employer is claiming the full amount of my tips, without subtracting the tip share that I pay. It equals out to a significant amount of money, which I pay taxes on and may even put me in a higher bracket.

I can not figure out what to do.

p.s. I am typically a standard deduction when preparing taxes.