Help to pay tax in Italy

Hi, I need a person who would pay on clients' behalf a tax debt after the tax submission in Italy. Business is not established in Italy, as well we are non-residents, sales is directed via an Amazon Italian warehouse. 1/ Tell me options - procedures to do this 2/ What you need for this - authorization, debt liability submission etc. This is a long-term project with the possibility of more clients One payment $30, possible expenses