Tax avoidance: tell HMRC the indirect tax scheme reference numbers you use (DASVOIT4)
Use form DASVOIT4 if you're a scheme user to tell HMRC the VAT, or other indirect tax avoidance scheme reference numbers.
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Tell HM Revenue and Customs (HMRC) the scheme reference numbers you use under the disclosure of tax avoidance rules.
Email HMRC to ask for this form in Welsh (Cymraeg).