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This form has been archived. As of April 2016 the rules changed, removing the personal allowance for those born before 6 April 1938. The effect is that from 2016 to 2017 everyone, regardless of their date of birth, will be entitled to the same personal allowance. New rules can be found at Income Tax: personal allowance and basic rate limit for 2016 to 2017.
Use form P161 age-related Personal Allowance to tell HM Revenue and Customs (HMRC) about your income if you were born before 6 April 1938.