Many people in Norway who run a sole proprietorship (ENK) do their own books and file their own tax return. Many of them do not know which deductions the law gives them, or they are unsure and leave them out. TaxSimplify is a web service that helps them find the deductions they are entitled to. The user logs in with BankID and enters their own figures. We go through 23 deduction categories, such as home office, car, equipment and courses, and show what may apply, with the rule and the source in the law for each one. The user approves everything before anything is passed on to the Norwegian Tax Administration, and the user is responsible for the information in the tax return. Pricing is no cure, no pay: the customer pays 20 % of what the deductions save them in tax. If we find nothing, it costs nothing. Tax returns can be corrected up to three years back, and the service is made for sole proprietors and freelancers. Next to this, AutoFix gives deadline reminders and guidance through the whole tax year: advance tax, VAT, the tax return and letters from the Tax Administration.