Does the IRS take taxes from your pension or 403B?

A 403B plan is a tax deferred retirement program that allows certain employees of schools and some non-profit organizations to defer taxes on income earned working for these organizations. It is almost the same thing as a 401K program. These plans allow income to be sheltered from income taxes until you withdraw this income from the plan. Pensions and 403B plans are not taxed until you receive the income.