What is non-disability income?

ALL of the other sources of worldwide income that you may be receiving or could be receiving that is NOT for your DISABILITY.

If you are receiving social security disability insurance payments for your disability then you are receiving A TYPE OF DISABILITY INCOME.

Or some other company paid or privately paid premiums of DISABILITY INSURANCE PAYMENTS that you could be receiving for your disability.

It is possible for some of the amounts of the above types of disability payment could also become taxable income to you on your 1040 federal income tax return.