Questão jurídica principal
Whether the dispute could be extended to include refund of VAT allegedly paid without legal basis.
Decisão extraída
Yes, exceptionally, because the refund question was closely connected to the issue of VAT liability and deregistration.
Fundamentação extraída
The refund claim formed the logical consequence of the absence of taxable status and there was a sufficiently close factual and legal nexus to justify extending the subject matter.