First you should review the Child Disability Starter Kit. This kit answers common questions about applying for Supplemental Security Income (SSI) benefits for children, and includes a worksheet that will help you gather the information you need.
It's all clear now. I have a new question about the account. So, what if I don't have a Social Security number?
You can create a my Social Security account today if you do not have one.
How do I learn more about the Appeals Council review?