Withholding (''Pay-As-You-Earn'' taxation)
Money, for example, that employers withhold from employees paychecks. This money is deposited for the government. (It will be credited against the employees' tax liability when they file their returns.) Employers withhold money for federal income taxes, Social Security taxes and state and local income taxes in some states and localities.
Source: Internal Revenue Service
A tax deducted from a salary, wage, or other income on behalf of the government at the time of payment of wages to the person who pays it.
Source: U.S. Courts