Where do I go to get shots so my son can go to school I'm low income isn't there a place I can take him?

1. Your state or county health department if you are in the US.

2. almost every US state has special medical insurance for children of low income homes, so he would go to his family doctor covered by his state health insurance.

Where do you live?
Do your kids not have doctors?
If you are in the US, there are plenty of clinics that give the vaccinations to children for free or at reduced prices so that the kids can get their shots.