I have a two Mexico foreign member in a LLC, one is an individual and the other is a foreign corporation. There is a treaty with Mexico, according to article II of the treaty their withholding is 10 % for an individual and 5 % for company owning more than 10%. 

I am filling the 8804 and the required withholding is 37% on regular earnings from the LLC. Where do you adjusts the withholding amount according to the Mexico treaty on the  8804.