VAT number is incorrect, please rectify. You can proceed without a VAT number, however Irish VAT (23%) will be added after free trial. You can add a VAT number at any time during your free trial.
Under EU VAT rules, if a valid VAT No. or HMRC Tax ID is supplied, no VAT will be due on the subscription. Otherwise, Irish VAT at 23% will be added (after any free trial).