I recently signed up for QuickBooks and I am having this exact issue. When I create an estimate and send it to a customer and they agree to it an invoice is automatically created and is due in 30 days. I am aware of my ability to change when the due date is but I can't find any settings to stop the automatic creation of these invoices. I see that this has been a problem for people in this discussion for over a year and I think it is quite ridiculous that it is still occurring. Respond to me with any advice or a solution and I don't want a bs response from QuickBooks about how I need to clear my cache or how an invoice is created from a partial estimate payment. There was no payment!!!