I just got a new Brother's LB 6800 machine and I am trying to find out if a Alphasew P60613 1/4" quilting foot will work with it it is snap on

I would call the dealer who sold it to you or the company to be sure. I buy my Brother parts/accessories from Warehouse Supplies.com and they are very knowledgeable. I just ordered again because last order they actually called & asked if I'd take a generic foot as it would take longer for the actual & they knew it would fit my machine. The generic was also much cheaper! Now that's Customer service!!