If you run a business, employ people or are self-employed, HMRC offer a summary to help you find out about tax reliefs and allowances that are available to you.
To explore the various allowances and reliefs that could be available, please take a look here: https://www.gov.uk/guidance/tax-reliefs-and-allowances-for-businesses-employers-and-the-self-employed and please don't hesitate to ask us for advice specific to your circumstances.