Where would the dividend taxes be found on the W2 form?

Dividend taxes are not reported on a W-2 form, as the W-2 is used to report wages, salaries, and tips for employees. Instead, dividends and their associated taxes are reported on a 1099-DIV form, which is issued by financial institutions to individuals who have received dividends from investments. If you receive dividends, you should look for the information on the 1099-DIV when preparing your tax return.