Winnie Begumisa, the Tax Mamba: One female lawyer’s passion for tax law If “it is not the size of the dog in the fight, but rather the size of the fight in the dog” was a person, then probably, Winnie Begumisa would be that person. She may not be your 5 Star tax lawyer, yet, but her can-do attitude says a lot about her aspirations. Tax Mamba, is her other name online and if you are wondering why, a Mamba of all things, just like I was, she has an ambitious explanation.