The type of settlement you received is considered a taxable settlement and should have been included in your 2021 Tax Return. If you reported the 1099-MISC correctly, Generally, the amount from Form 1099-MISC, Box 3 is reported as Other Income on Form 1040, Line 21.
I advise you to go back to your 2021 1040 and see if that amount is on Line 21 before you file an amendment.
