627. Records to be kept for the purposes of personal, trustees' and partnership returns.

A person who is required by notice to deliver a return for a tax year or other period must: (1) keep all such records as may be requisite for the purpose of enabling him to make and deliver a correct and complete return for the year or period; and (2) preserve those records until the end of the relevant day1. Any person who is required by such a notice given at any time after the end of the specified day, to make and deliver a return for a tax year or other period and has in his possession at