Some people don’t claim the right amount of VAT they are due on goods and services purchased before they started in business.
Have you remembered to claim all that you should have?
There are time limits for how far back you can claim for VAT on costs before you registered for VAT. The time limits are four years for goods that you still had at the date of your registration (or that you used to make other goods you still had) and six months for services. You can find more here