If you receive SSI, you do not enter it anywhere on a tax return. But ---- SSI and Social Security benefits are not the same thing---so understand the difference. If you receive Social Security benefits, you will receive a SSA1099 in January. If the Social Security is your ONLY income (or a combination of SSI and Social Security) you do not need to file a tax return unless you have a 1095A for marketplace health insurance. If you also have some other source of taxable income from a job, self-employment, investments, retirement income, etc. you may need to file a tax return.
WHAT IS THE DIFFERENCE BETWEEN SOCIAL SECURITY BENEFITS AND SSI?
https://www.ssa.gov/ssi/text-over-ussi.htm
Who has to file?
http://www.irs.gov/uac/Do-I-Need-to-File-a-Tax-Return%3F
Go to Federal> Wages & Income>>Retirement Plans and Social Security (SSA1099 and 1099RRB) to enter your SSA1099.