Annual Accounting & Flat Rate Scheme (VAT66AAFRS) Flat Rate Scheme (VAT600FRS) Annual Accounting Scheme (VAT600AA) Key Tax Deadlines Authorising your agent (64-8) Paying Class 4 NIC by S Order (CA5601) Cancelling Vat Registration (VAT7) Registering for self assessment (SA1) Corporation Tax (CT204active) Registering for self employment (CWF1) Corporation Tax (CT204review) Registering for Vat (VAT1) Corporation Tax CT41G-dci Vat Partners Details (VAT2)