The “AT” (Tax Office) wants to assure that all entrepreneurs receive their correspondence in a secure and unquestionable manner. To this end. all Sole Traders registered for VAT are now obliged to have an electronic post box with www.viaCTT.pt. The viaCTT account must be activated within 30 days after VAT registration. The rule applies to sole traders once they have reached an income of over than 10.000€ in the preceding year. Fines for non-compliance go from €50 to €250.