HMRC FormsHM Revenue & Customs Forms 64-8: Authorising your agent CWF1: Becoming self employed and registering for National Insurance contributions and/or tax CA5601: Direct Debit Mandate for self-employed people CH2: Child benefit claim form P11D(b): Return of class 1a national insurance contributions due P46: Car provided for the private use of an employee or director VAT1: Application for registration VAT2: Partnership details VAT7: Application to cancel your VAT registration VAT65A: Application for refund of VAT VAT68: Request for transfer of a registration number More HM Revenue & Customs forms..