I can give a list of income that is generally non taxable but it will not include your specific situation because that's not how IRS operates.
Here's the list of income that is usually not taxed by IRS:
gifts and most inheritances
life insurance proceedschild
certain veteran’s benefitsdividends
on veteran’s life insurance loans
insurance reimbursement of medical expenses
not previously deducted
compensatory damages for personal physical injury or physical illness
some qualified pension distributions
for Public Safety Officers
income from qualifying scholarships
As you can see, court settlements are not even listed. For tax purposes income and deductions
are categorized by the type of income. Your's is categorized as settlement. The link I gave you before talk about how the settlements are taxed. IRS has it's own rules and supersedes any court settlement. If you want your settlement to be nontaxable you and your attorney have to structure/write it in certain way that will fit IRS nontaxable income definition. That's the only way IRS will accepted as such.
On page 30 of pub 525 read under "court awards and damages", it clearly states
that you have to include settlements in your taxable income with exception for physical injuries. You will not find a reliable source that will list your type of settlement as nontaxable.