How can you pay the due tax, vat, excise to custom department during marketing the products?

There are some rules,ordinance,notice,memorandum etc from custom department of any country to pay the due tax,vat,exicise etc for marketing the products.The amount of tax,vat,exicise varries on the type,number/amount,place ,country,consumer level of the product.So following the instructions of custom department of the related country we can estimate and pay the amount of tax,vat,exicise etc for marketing the listed products.