The key facts about tax audit due date are as follows. The Gujarat High Court has ordered an extension of the ITR filing due date for audit cases. However, the evidence does not provide specific details about the new due date. It only mentions that the court has made this order, but the exact date or period of the extension is not specified. The evidence does not provide information about the previous due date or the original filing deadline. It also does not mention any other key takeaways related to the tax audit due date. The order to extend the due date is the primary information provided by the evidence.