Hello,
The minimum income requirement for your dependent son to file a federal tax return for 2022 is if you have an earned income of at least $12,950, or unearned income (like interest or dividend) of at least $1,150. As long as your son had earned income, he can contribute to IRA, regardless of age. Form 5498 is just informational and you do not need to file it with your tax return, anyways. Please let me know if you have any additional questions and please give me a thumbs up if I answered your question.
