How much can you legally write off on taxes? B ill Werbeniuk was a Canadian professional snooker player in the 1970’s & 1980’s. He was also the holder of a medical certificate that approved his drinking. Even better, he could offset the cost of beer against income tax. Werbeniuk “suffered from a hereditary nervous disease (or so he and his doctors claimed) which caused his hands to shake. The only solution which allowed him to participate in his trade was drink”.  No, before