There is a legal requirement to retain records relating to the self assessment tax return. Although it is the taxpayer who must retain the records, it is acceptable for the agent to retain documents on their files, subject to the firm鈥檚 internal policy on document retention and data protection.
It is not specified in the legislation in what form the records must be kept (eg electronic records or paper copies). However, there is guidance in the HMRC Compliance Manual on this matter (see below). There is also guidance on the GOV.UK website.
Digital record keeping required under making tax digital (MTD) is discussed at the end of this guidance note.
Even taking into account the time limits for keeping records discussed below, it is still a good idea to advise the taxpayer to retain documents relating to exceptional transactions for a longer period of time. If HMRC suspects that evasion has taken place, it can raise tax assessments going back as far as 20 years. As this is outside
Losses on shares set against incomeUsually, allowable capital losses can only be set against chargeable gains. If the losses are not fully utilised against gains in the year in which they arise, the excess is carried forward to use against future gains. See the Use of capital losses guidance note
Sales, advertising and marketingExpenditure on sales, advertising and marketing activities may include amounts which are disallowable for the purposes of calculating trading profits. This may be because the expenditure is:鈥apital in nature (see the Capital vs revenue expenditure guidance note)鈥ot
FRS 102 鈥� tax presentation and disclosuresPresentation of tax under FRS聽102An entity must present changes in a current tax liability (or asset) and changes in a deferred tax liability (or asset) as a tax expense (or income) unless the item creating the current or deferred tax amount is recognised in