The ATO has just published the claims that they will take an interest in for the 2019 financial year.
The work related expenses which are the usual claims for truck drivers include :
Claims for work related clothing
Overtime meal claims
Union Fees and Subscriptions
Mobile phone and internet costs
Motor Vehicle claims for the 5,000 business kilometres.
You should ensure you have the necessary receipts to back up all the above claims.
There is no issue claiming any of the above expenses as long as you have the associated
Substantiation / receipt to back up your claim. The ATO is concerned that there is a number of small claims being made by various taxpayers, but when all taxpayers are claiming similar amounts it starts to have an issue.