The doctrine of merger applies where the Appellate Tribunal has...

The doctrine of merger applies where the Appellate Tribunal has passed a final order in an appeal: prior interlocutory orders, including a recall order, merge into the final appellate order and cease to have independent existence. A writ petition challenging the recall order therefore cannot survive once the final order is challenged through the available statutory tax appeal. The challenge to the final order must be pursued in that statutory appellate remedy, and the writ petition was dismissed.