Quite frequently when you buy something online from a company's web-site you see the price and it states that all applicable taxes are included. The company, however, will never disclose to you if they have ever crossed the threshold for sales tax in your country in order to charge you that tax, and possibly it's not even registered for VAT in your country. That's especially true for small online businesses.
In such a case, can the company simply include some average VAT amount in its prices in order to keep the prices fixed and equal for everyone?
And if it happens that the company does not have to charge VAT for a particular buyer due to not exceeded VAT threshold, must it simply state in the receipt "No tax included," or can it include a VAT% anyway and just pocket that amount without even showing their VAT number in the receipt?