untied is an HMRC recognised app that helps you prepare and file your self assessment tax return from your phone, tablet or web browser. (https://www.untied.io) untied is the best app for sole traders, freelancers, digital platform workers, landlords and anyone else who wants to save money on submitting their self assessment tax returns. untied links your bank accounts, tracks your income, expenses and mileage, learns about you and your business as the year progresses and allows you to submit