Deferred tax

Jasper Orange Co's trial balance at 31 December 20X3 shows a debit balance of $700,000 on current tax and a credit balance of $8,400,000 on deferred tax. The directors have estimated the provision for income tax for the year at $4.5 million and the required deferred tax provision is $5.6 million, $1.2 million of which relates to a property revaluation. Why do we remove the 1.2 million from the total tax liability for the year?