Please can you add this to your options.

If I had know this when signing up I would have used something like Zero instead simply because of that one oversight.

I looked when I was first setting up but assumed I just hadn't found the right button and left it to come back to when I had more time, never would it have occurred to me that it wouldn't be an option.

Its accountancy software for business for gods sake.

I'm  now faced with a customer that will not raise a sizable PO off the back of an estimate.