“you can make a single return and pay any tax shown on the return as being due. You can do this by getting the appropriate form from this office…if you make a return but we do not consider it satisfactory, you will be told accordingly.”
“Where a person has failed to make any returns required under this Act (or under any provision repealed by this Act) or to keep any documents and afford the facilities necessary to verify such returns or where it appears to the Commissioners that such returns are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 and notify it to him.”
“where the Commissioners consider it necessary in any particular case to vary the length of any period or the date on which any period begins or ends or by which any return shall be made, they may allow or direct any person to make returns accordingly, whether or not the period so varied has ended.”