Does dependent have to file?

I claimed my 17 year old full time student. Does he have to now file taxes? He had approx 4800 in wages and $10,900 in Maryland unemployment. I asked this earlier and was told yes BUT .... When I filled out the forms to file, his AGI is only like $5330 which is is UNDER the $6300 requirement of having to file in 2020. So does he really have to file since his AGI is lower?