There is no amount limitation as far as reporting income on a tax return. If the income is not exempted from taxes by law then it is entered on a tax return (assuming you meet the requirements to file a return for the tax year). Having said that, there are some settlement payouts that are not taxable. For example those related to physical injury or discrimination. Here is an IRS link for reference.
Since you likely did not get an income form for the payouts, if they are not exempted, you can enter them using the steps:
Wages & income>Less Common Income>Miscellaneous Income>Other Reportable Income