drbabyface4u2,
According to the IRS (https://www.irs.gov/faqs/social-security-income/regular-disability-benefits/regular-disability-benef...) you do need to report the SSA-1099. While SSI benefits are not taxable, they also do not appear on an SSA-1099. You should amend your return.
Whether that income will affect your taxes depends upon how high it pushes your total income. Basically, below $32,000 income none of the SSA income is considered taxable.
You may or may not need to also amend a state return. Some states exempt some or all social security from state taxation. If that is the case, then if you do get a letter from the state inquiring why you didn't amend your state return (if, of course, your state does have an income tax), just reply that the change was adding an SSA-1099 which did not change your state return.
