What category does Capital Allowance - writing down allowance go under?

Hello Neil, the Self -Employed product enables you to account for your allowable and disallowable expenses, this is a partial template and accounts  boxes 17 - 46, of the self assessment form. Capital allowances are accounted for in the actual self assessment form boxes 49 - 59. SO you can enter them manually on the Self Assessment form at Hmrc when it comes to filing the Self Assessment.