Scenario: Craig's client, Travis Waldron, suffered a terrible office fire. Everyone is fine, but his entire business was decimated. And while insurance will cover the property, it won't cover Travis' outstanding bills, including the one from Craig. Craig is going to have to write off Travis' outstanding invoice, but the products were taxable, and using the Write Off tool won't reduce his tax liability. You'll have to use a Credit memo instead. Let's see how that would work.