Letters are being sent out to Australian taxpayers who have fallen foul of the ATO's data-matching system. Don't fret if you get one.

Receiving one of these letters doesn't mean that the taxman is coming to to destroy your existence - it just means that something doesn't line up with your tax return and you're being given a chance to fix it.

This tax season the ATO is coming after those who fudge their annual returns, sometimes helped by their tax agents, including claiming for expenses that have nothing to do with work.

Planning to lodge your tax return yourself this year? Be careful as the Australian Tax Office (ATO) will be watching closely in 2018. Here are four traps to avoid.