Take a deep breath Sweetpea! Okay, you know where to get your boxes and shrink tubing so you can order it. Microsoft has template for invoices that you can customize and use. If you decide on Quickbooks or Peachtree for your accounting/inventory, you will be able to generate invoices from those programs. Another program you might want to look at is My Invoices and Estimates Deluxe. I started out using that program before I got my Peachtree. It allows your to generate invoices that coordinate with your logo and/or website. I think it's $29.99 or $39.99. That might be an idea until you decide what accounting program you want to use. I believe Best Buy, Office Depot & Office Max carry the My Invoices software. If not, here's the URL where you can order it online: www.Elibrium.com . I hope this helps you out some. Congratulations on your huge wholesale order. Your going to do a great job. Remember, take a deep breath, then a big drink, LOL!