How do you deduct your broker fees from your gains or add them to losses?

[Texas Roger]

The IRS does not allow you to write off transactions fees, such as brokerage fees and commissions, when you buy or sell stocks. Instead, you can add the amount of those fees to the purchase price of your stock. The purchase price plus the cost to acquire your stock equals your cost basis.

[Critter-3]

Your broker should account for these fees automatically in the basis of your stock or in the sales price ... check the 1099-B or ask the broker.