Are you referring to a state credit? If so, what state?
Or are you referring to the Federal Credit for the Elderly or the Disabled?
It is a credit for taxpayers:
- aged 65 or older OR retired on permanent and total disability and received taxable disability income for the tax year; AND
- with an adjusted gross income OR the total of nontaxable Social Security, pensions annuities or disability income under specific limits.
Income limits are here page 5.