“ Where a person has failed to make any returns required under the Act..... or to keep any documents and afford the facilities necessary to verify such returns or where it appears to the Commissioners that such returns are incomplete or incorrect, they may assess the amount of VAT due from him to the best of their judgment”
“ When faced with “best of judgment arguments” in future cases the tribunal should remember the following four points. (i) Its primary task is to find the correct amount of tax, so far as possible, on the material available to it, the burden resting on the taxpayer. In all but very exceptional cases, that should be the focus of the hearing...... .....”