Tax question???

Hi all,
Maybe someone on here can clarify from previous experience......

So I sold a heap of shares on June 28th at a profit but the money was not taken from my trading account, instead I bought back in on July 2nd.

My question is, would that profit be subject to tax even if it never left the trading account? My tax man has calculated it as earnings but I have since been told by a financial planner that it should not be subject to tax because it did not leave my trading account.

Cheers