You can find your monthly VAT invoice in MultiSafepay Control. Login to your account and navigate to Finance -> Invoices.
The VAT invoice is also sent to the email address listed under Financial email in your MultiSafepay Control. If you have not added an email address under Financial email, your invoices will be sent to the main email address, as listed in your account.
You can add a financial email address by selecting Contact Information in your account and adding your preferred email addresses.