CH53300 - Assessing Time Limits: Extended time limits: 6-year time limit
The 6-year time limit only applies for income tax, capital gains tax and corporation tax, stamp duty land tax, stamp duty reserve tax and petroleum revenue tax.
An assessment to recover under-assessed or over-repaid tax can be made within 6 years of the end of the relevant tax period where the under-assessment or over-repayment is due to the careless, see CH53400, behaviour of
The 6-year time limit does not apply where the tax to be assessed as a result of a person’s careless behaviour is VAT, insurance premium tax, aggregates levy, climate change levy, landfill tax or excise duty.
You can find details of the time limits that apply for each type of assessment in tables at CH56000+. You should check the appropriate table before making your assessment.
You need approval from the Business Unit Head or a Grade 6 before making an Extended Time Limits assessment, see EM3345
