What type of tax is collected by a mediating agent from the person who is responsible for paying the tax?

The type of tax collected by a mediating agent from the person responsible for paying it is typically referred to as a "withholding tax." This tax is deducted at the source by the mediating agent, such as an employer or financial institution, and is then remitted to the tax authorities on behalf of the taxpayer. Withholding taxes are commonly applied to income, dividends, and interest payments.