SSI is less money than SSDI. I don't think you could ever make enough to be taxable with SSI. I think the most you can get is seven hundred and something a month. My son gets a statement from them monthly with his SSI. He also had income from a sheltered workshop and that factors into how much he gets. Not sure if you will receive monthly statements without other income. It says right on his statement that it's SSI. If you don't get a statement you need to contact Social Security and see if you are receiving SSDI and if you can get a duplicate 1099. They don't do form 1099 for SSI.