Form SSA-1099 reports a taxpayer's Social Security benefits, according to the Internal Revenue Service. The Social Security Administration issues the Form SSA-1099. Sample worksheets, including instructions and tips on calculating and submitting information, are available on the IRS website.
An individual may have to pay taxes on his Social Security benefits if the sum of half of the received benefits and all other income exceed a specified amount, according to the IRS. Information reported on Form SSA-1099 is relevant when preparing a taxpayer's Form 1040. If a taxpayer did not receive IRS Form SSS-1099, or he lost it, he may be able to print a form from his Social Security account at SSA.gov. A taxpayer can also call to request a mailed form.