Can I claim my lunch on my Tax?

On a normal work day, the answer to this one is a big NO. 

The ATO says that your lunch is a private expense.

If, however, you are travelling away from home overnight for work (and you employer doesn’t reimburse you) then you can claim the cost of the meal. 

If your employer pays you an allowance to cover this meal, the allowance will be included as income on your tax return, and you will make a claim for the meal as an expense. 

Make sure you keep a record of the cost so you can claim it. (There is a special rule about not needing receipts if you spend under the ATO’s reasonable rate, and received an allowance, but receipts are always best)

Don’t forget, keeping clear records, receipts and logbooks will always help you to receive the best possible tax refund.