I have 17 years old child and she has a 1099-NEC for $6,600 and I supported all of his living expenses. Does he need to file his 2021 tax returns if I claim him to my 2021 tax returns? Or If I need to add his income to my tax returns, how can I add my 1099-NEC self-employed income to my (the parent's) tax returns? Your advise is greatly appreciated.
