On your federal return, there are some tax breaks available to disabled persons – certain types of income won’t be taxable, for example, and you may even qualify for a tax credit.
Some states also provide tax benefits.
Please see the TurboTax article Tax Tips for the Legally Disabled for possibilities.
The TurboTax Help articles Is my disability pension considered earned income? and Is disability income taxable? are also helpful.
Your refund question was answered by bluedeb, above.
