This requires a quick and easy fix with the ability to follow and understand instructions. The format for QuickBooks in Tanzania is normally the 8 Digit and 1 Alphanumeric. Thus, it should be something like this: 12-123123-A. All you have to do is replace the last number with an A and put a - before it and a - after the first two numbers. It worked for me and I was able to add my TIN Number to the system.