Step 1: Create a Fuel category in the Inventory module

• Go to "Inventory Management" / "Product/Job code management",
• Click on the spyglass right next to the "Category field",
• Click on the "+" sign,
• In the Category number field, enter 900,
• In the Description field, enter FUEL SALES,
• Check applicable sales tax fields,
• Do not check any other options ,
• Click Save and Exit.

Step 2 : Product

• Create all product code using the you "Fuel category",
• DO NOT CHECK: Tax included,
• TAF and TCP field should be in cents/liter or gallon: they will be included in the note field,
• Click Save and Exit.

NOTE: using a "fuel product" will generate a product with taxes included: the taxes will be rounded up by 1 penny sometimes to match complicated calculation 

Step 3 : Configuration

• Go to "Configuration" / "General information",
• Go to the "General information" tab,
• In the TAF and TCP fields enter the applicable GL accounts,
• Save and exit.