You don't need to report those if that is your only income. Disability benefits you receive from the Department of Veterans Affairs (VA) aren't taxable and don't need to be reported on your return. However, Military Disability Retirement pay could be taxable if reported on form 1099-R.
Generally, Social Security Disability Benefits (SSDI), aren't taxable unless you have substantial additional income (more than $25,000 for an individual or $32,000 for married filers). If you don’t normally file a tax return, you don’t need to do anything to get your stimulus payment. And if you receive Social Security or Disability benefits, your stimulus payment will be included with those automatically.