maglib
Level 10

State tax filing

yes, agree interns and coops and other 1099Misc, self employment income, can and often do provide over half their support from earned income. Knowledge about where income can come from, even SE income may be a lower tax rate than the 39.6% rates at the students kiddie tax rate.  Only if the student does not get credit for the internship and coop would it not apply to full time student rule, otherwise it is part of the 5 month rule.
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I am NOT an expert and you should confirm with a tax expert.