Changing 2% of total supply

Hey Guys
Safemoon contract says wont permit to people to sell more than 2% of total supply , I found below code if im right! how can change selling limit to max 0.05% of total supply ?

 function calculateTaxFee(uint256 _amount) private view returns (uint256) {
        return _amount.mul(_taxFee).div(
            10**2