Regardless of the field in which your company operates, you generally need to know what the taxation of costs is, i.e. what the state requires you to pay. You could also find out what the state benefits are so that you will not pay more taxes out of ignorance than you actually should. We are talking about the taxation of costs, i.e. the logic of corporate income tax in Estonia and elsewhere, tax-free and taxable costs, fringe benefits and non-business costs.