Thanks for joining in this conversation, @Joshocs.

At this time, the option to let customers accept estimates online is still unavailable. It could be that your friend uses a third-party app as suggested by my peer @ GlinetteC here in this thread.  

You also want to visit our QuickBooks App Center to look for the best app that works for your business. You can search for a keyword like Estimates to get started. 

Let me know in your reply if you have any additional concerns. I'll be around to help.