How do I change the appearance of invoices sent to customers? My company name has several characters and letters throughout it and it looks very unprofessional

Hi mike-mikesgarage, 

It's important to have the ability to edit your invoices so they stand out to your customers. I'll be happy to share more information so you're on the right track. 

At this time, the ability to customize invoices isn't available in QuickBooks Self-Employed. The feature you're looking for is available in QuickBooks Online instead. I encourage you to learn more about QuickBooks Online using this link here. Based on what you've described, I suggest contacting our Self-Employed support team so they can help investigate why the characters aren't showing up as they should. Here's the link to contact a specialist. 

Let me know if this info helps. Otherwise, don't hesitate to ask other questions. I'm here to help you achieve your QuickBooks goals.