I know how important it is to have your taxes being calculated automatically in QuickBooks Self-Employed. However, for now, you'll need to calculate the sales tax and track them manually.
This sounds like a nice thing to have this option. I'll take note of this and add it to our list of ideas. While that feature isn’t currently in our development roadmap, we are working on big improvements that will be helpful for the majority of our customers, and you’ll see those rolling out soon through our QuickBooks Blog.