Disability retirement pay you receive as a pension, annuity or similar allowance for an injury or sickness that resulted from active service is not included in taxable income. The same treatment covers VA disability compensation and pension payments to veterans and their families, grants for a home designed for wheelchair living, grants for a vehicle if you lost your sight or the use of a limb, and dependent-care assistance benefits.
There is nothing to apply for. Leave these payments out of the income you report on your Oklahoma return. IRS Publication 525 explains which payments count as disability benefits.
Your VA award letter showing the payments and what they are for.
