The only income I have is about £10,000 from letting rooms in my own home. As this amount is covered by the rent-a-room relief of £4,250 plus my personal allowance of £6,475 I should have no tax to pay. But do I have to inform the Tax Office about this income?
Yes you do have to tell the Tax Office, and they should issue you with a self-assessment form to complete. Even if you have no tax to pay you need to declare the taxable income to the Tax Office. If you haven’t declared this rental income for some years you should make it clear to the Tax Office that you want to declare this income for the past years.