MM01 field tax clasification in Sales Org1 population issue

Hi,
In MM01 we we effort to make a material, we person a tract called taxation clasification successful Sales Org1 tab, this taxation clasisfication tract is getting populated automatically erstwhile we participate plant, income org and organisation channel.

This is happening for immoderate materials and not for immoderate materials. Please fto maine cognize ois determination immoderate config for this to car populate the taxation clasiifcation codification based connected institution codification oregon state oregon taxation procedure. If yes wherever we request to check. Or is it immoderate happening related tp customized codification added to populate the taxation clasification code.

Thanks

Kishore