Mark Yes if she had no other income
Whether it's a parent, friend, or relative you support, being able to claim someone as a dependent can save you money. If you're not sure you can claim your parent or another person as a dependent, TurboTax will help you figure that out.
Generally, you can claim your parent if they didn't have more than $4,150 in gross income (excluding nontaxable Social Security) and you provided more than half of their support. Your parent doesn't have to live with you. There are a few other specifics we'll ask you about as we go along.
Your mother's SSDI is probably not taxable unless she receives other income.
Is disability income taxable? https://ttlc.intuit.com/replies/3301926