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An amendment of a PPh Article 21 tax return is the right of a taxpayer to correct a previously submitted Monthly Tax Return so that it reflects the actual condition. The legal basis is regulated under Article 8 of the KUP Law, as long as the DGT has not conducted a tax audit. In CoreTax<\/a>, an amendment does not delete the previous tax return (SPT)<\/a>, but instead calculates the difference through the delta SPT mechanism.<\/p>\n Read Also: How to Calculate PPh Article 21: Complete Guide with Examples<\/a><\/strong><\/p>\n An amendment can be made at any time as long as there has been no audit notice from the DGT. For Monthly PPh Article 21 tax returns, reporting still follows the general deadline, which is no later than 20 days after the end of the tax period. If the amendment results in an underpayment, the tax payment obligation must be settled before the return is submitted.<\/p>\n Before accessing CoreTax, make sure you have prepared:<\/p>\n Complete documentation will minimize system errors.<\/p>\n Read Also: Unified Monthly PPh Tax Return: Definition and Legal Basis<\/a><\/strong><\/p>\n Below are the steps to amend a PPh Article 21 tax return in CoreTax:<\/p>\n Log in to CoreTax DJP using your NPWP and password. Once successful, you will see the main dashboard.<\/p>\n Amendments always start in e-Bupot. Select the appropriate type of withholding slip, such as BPA1 for permanent employees. Edit the previous withholding slip, correct the income data, deductions, or identity details, then save it as an amended withholding slip.<\/p>\n Go to the Tax Return (SPT) menu, select PPh Article 21\/26, then set the status as an amendment and enter the amendment sequence number. The system will automatically pull the amended withholding slip data.<\/p>\n Review all attachments, the number of income recipients, total PPh withheld, and tax object codes. Errors at this stage often cause unexpected tax discrepancies.<\/p>\n CoreTax uses the delta SPT mechanism, which calculates the difference between the previous tax return and the amended tax return. If there was previously an overpayment that becomes an underpayment, only the difference needs to be paid. This mechanism prevents recalculation from zero but requires extra accuracy from taxpayers.<\/p>\n Read Also: Differences Between Monthly and Annual Tax Returns: A Taxpayer\u2019s Guide<\/a><\/strong><\/p>\n If the amendment results in an underpayment, you must generate a Billing ID and settle the tax before submitting the tax return. If there is an overpayment, the excess can be compensated to the next tax period in accordance with CoreTax provisions.<\/p>\n Amendments that increase tax payable are subject to administrative interest sanctions in accordance with the KUP Law. Other common risks include double compensation or incorrect tax object codes, especially following format changes under PER-11\/PJ\/2025.<\/p>\n Amending a PPh Article 21 tax return in CoreTax requires technical understanding, data accuracy, and up-to-date regulatory knowledge. We understand that for many business owners, consultants, and freelancers, this process can be time-consuming and risky if done incorrectly.<\/p>\n That is why we at vOffice provide accounting and tax return reporting services<\/a><\/strong> designed to simplify your entire tax process. With the support of a professional team, you can focus on your business without worrying about errors in PPh Article 21 tax reporting.<\/p>\nWhen Can an Amendment Be Made?<\/h2>\n
Documents You Need to Prepare<\/h3>\n
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Steps to Amend PPh Article 21 Tax Returns in CoreTax<\/h2>\n
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Log in to CoreTax<\/h3>\n<\/li>\n<\/ol>\n
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Create an Amended Withholding Slip in e-Bupot<\/h3>\n<\/li>\n<\/ol>\n
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Create an Amended Monthly Tax Return<\/h3>\n<\/li>\n<\/ol>\n
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Verify Attachments and Calculations<\/h3>\n<\/li>\n<\/ol>\n
Understanding the Delta SPT Mechanism<\/h2>\n
Handling Underpayments and Overpayments<\/h2>\n
Sanctions and Risks of Incorrect Amendments<\/h2>\n
Closing and Solutions for You<\/h2>\n