Wash sale

A wash sale occurs when a taxpayer sells or otherwise disposes of stock or securities (including a contract or option to acquire or sell stock or securities) at a loss and, within 30 days before or after the sale or disposition, the taxpayer buys, acquires, or enters into a contract or option to acquire substantially identical stock or securities.  

Withholding Allowance

Claimed by an employee on Form W-4. An employer uses the number of allowances claimed, together with income earned and marital status, to determine how much income tax to withhold from wages.  

Withholding Tax

Income tax is withheld from the pay of most employees. Income tax may also be withheld from gambling winnings, pensions/annuities, unemployment compensation, and certain federal payments, such as social security. In some cases income tax may be withheld on other types of income such as interest or dividend income.  

Worldwide Income

U.S. citizens and U.S. resident aliens are required to report worldwide income on a U.S. tax return regardless of where they live and even if the income is taxed by the country in which it was earned. Filing requirements are the same as for U.S. citizens and U.S. resident aliens living in the United States and apply whether income is from within or outside the U.S.