For a Eat Perceing Do You Have To Have a Parent or guardian even Thoe you’re 16 or older ?

Yes, you need a parent/guardian to accompany you while underage.

For sure can't have tattoos under 18 but I think the law says that you can have a piercing as long as you have written consent from your legal guardian. But it's got to be a written consent that they'll have to keep on file. I could be wrong but you can call them to be certain. One thing for sure is that they're not gonna do it at Timeless (or other reputable places) if it's in any way fishy...

Yes