The definition of a disabled person is based the definition used for purposes of Social Security disability benefits. A person is disabled if unable to have substantial gainful employment. For purposes of being exempt from the 10-year rule for required minimum distributions applicable to beneficiaries who inherit from a person dying after 2019, the disability must be long term (not merely for a 12-month period used for Social Security purposes). The definition of a chronically-ill person is the same definition used by the Tax Code for long-term care contracts, meaning that the beneficiary is unable to perform at least two of five activities of daily living (e.g., bathing, transferring) or have a cognitive impairment requiring supervision for health and safety. Being chronically ill requires certification by a health care professional; being disabled does not.
A tax technique of applying a loss or credit from a current year to a later year. For example, a business net operating loss may be carried forward 20 years instead of being carried back.