@Be4Him66 Your son will have to amend. He made more than one mistake. He should have said he could be claimed, and he should have entered self-employment income as such and should pay self-employment tax for Social Security and Medicare if he received income on a 1099NEC. When his return has been fully processed he can amend. Perhaps the IRS will catch his mistake and bill him for self-employment tax. If they do not then he can amend.
**Disclaimer: Every effort has been made to offer the most correct information possible. The poster disclaims any legal responsibility for the accuracy of the information that is contained in this post.**
