How to Settle Underpaid Annual Tax Return in Coretax: Follow These Steps

For some taxpayers, there is an underpaid status on their Annual Tax Notification Letter (SPT) in Coretax. However, taxpayers can only submit their annual SPT once they have settled it. Settling the underpayment is a prerequisite for proceeding to the next stage. “There are two ways to pay the underpaid SPT: using a deposit or a billing code,” explained DJP Cortexpedia. So, what are the steps? Here is the explanation. If there is no deposit balance, taxpayers can opt to generate a billing code. In this method, the system will automatically issue the billing code, and the SPT status will change to “SPT Awaiting Payment”. If the billing code does not download automatically, taxpayers can check it through: [Note: Specific checking method not detailed in source]. It should be noted that all types of SPT reporting and payments have been extended until 30 April 2026 for both corporate and individual (OP) taxpayers.