Mistakes are very much a part and parcel of life, right? They may happen while using such a user-friendly software like QuickBooks as well. Sometimes, you may discover that you have actually attached an invoice with a wrong account or you have billed a customer twice inadvertently. This is the reason why we keep getting queries such as How Do I Delete an Invoice in Quickbooks. The frequency of such questions tells us that this mistake is a pretty common one.