This is called Making Tax Digital for Income Tax (sometimes you’ll see this shortened to MTD for Income Tax).
If you have qualifying income from property and/or self-employment that is over £50,000 from April 2026, over £30,000 from April 2027 and over £20,000 from April 2028 – you will be legally required to use Making Tax Digital.
Find out everything you need to know, from how it works to when it starts, and what software might be needed here: https://makingtaxdigital.campaign.gov.uk
HM Revenue & Customs are also running live webinars to help you understand the requirements of MTD for Income Tax and the practical steps businesses can take. You can see the upcoming dates and sign up here: https://register.gotowebinar.com/rt/2952541011876113496