Hey all!

I got a citrus plant from Home Depot a few years back. I'm just recently trying to get a better understanding of it, since it hasn't flowered yet.

I think I've found it's graft line, but I wasn't sure since it is about a foot from the soil. All google images I've seen, it is usually lower.

Can anyone identify the graft line for me?

Here is there I think the graft line is (right where the little green branch is coming out of):