You must keep all records relating to the fringe benefits you provide, including how you calculated the taxable value of benefits. 

Your records must also show justification of claims for exemptions or concessions that reduce your FBT liability.

• Calculations. 
• Worksheets. 
• Employee declarations. 
• Elections. 
• Invoices. 
• Receipts. 
• Bills of sales. 
• Lease documents. 
• Travel diaries. 
• Fleet management records. 
• Logbooks. 
• Odometer records. 
• Valuations – if and when required. 
• Purchase receipts for vehicles. 
• Receipts for service or maintenance of vehicles. 
• Estimates of your FBT liability if you choose to vary the FBT amount.