The Coretax System, Indonesia’s new digital tax administration platform, has been facing several technical issues since its launch. Many taxpayers and businesses have reported login failures, authorization errors, and problems with tax invoice submissions. If you are experiencing difficulties, this guide provides practical Coretax system errors troubleshooting steps to resolve common Coretax errors efficiently.
1. Login Failures
Issue:
- Unable to log in to the Coretax system.
- Login page not loading or showing errors.
Solutions:
- Check Network Stability: Ensure you have a stable internet connection. If needed, switch to a different network or mobile data.
- Clear Browser Cache & Cookies:
- In Chrome: Press
Ctrl + Shift + Delete→ Select “Cookies and Cached Images” → Click “Clear Data.”
- In Chrome: Press
- Use Incognito Mode: Open Coretax in an incognito/private window (
Ctrl + Shift + Nin Chrome). - Try a Different Browser: Preferably Google Chrome or Mozilla Firefox.
- Check Server Status: Visit the DJP’s official website or social media for system maintenance updates.
2. Authorization & Electronic Certificate Errors
Issue:
- Unable to access Coretax due to authorization failure.
- Electronic certificate not recognized.
Solutions:
- Verify Certificate Validity: Ensure your e-Certificate is valid and has not expired.
- Reinstall the Certificate: Download the latest e-Certificate from DJP Online and reinstall it.
- Use the Correct File Format: Ensure your certificate file is in
.p12format and correctly imported into your browser. - Disable Browser Extensions: Some security extensions may block the certificate from loading. Disable them temporarily and try again.
3. OTP Not Received
Issue:
- OTP (One-Time Password) for login or transactions is not received.
Solutions:
- Check Spam/Junk Folder: Sometimes OTP emails may be filtered into spam.
- Try Resending OTP: Wait 5 minutes and request another OTP.
- Use an Alternative Contact Method: If using email, try switching to an SMS OTP (if available).
- Verify Phone Number & Email: Ensure your registered email/phone is correct in the Coretax system.
4. Issues with Taxpayer Profile Updates
Issue:
- Cannot update taxpayer details.
- Errors when editing address, contact details, or business status.
Solutions:
- Log Out & Log In Again: Profile data may need a session refresh.
- Try Updating Outside Peak Hours: Avoid system congestion by accessing Coretax early in the morning or late at night.
- Check Your Taxpayer Status: If your NPWP (Taxpayer Identification Number) has issues, contact DJP support.
5. Billing Code Errors
Issue:
- Cannot generate billing codes.
- Payment reference number is incorrect or rejected.
Solutions:
- Re-check Tax Code & Year: Ensure you have selected the correct tax type and year when generating the code.
- Wait for System Refresh: Sometimes, billing codes take time to sync. Wait 15-30 minutes and try again.
- Contact the Bank: If a payment error occurs, check with your bank to ensure there are no transaction issues.
6. Errors Uploading Tax Invoices (Faktur Pajak)
Issue:
- System does not accept uploaded invoices.
- Errors while submitting invoices.
Solutions:
- Use the Correct File Format: Ensure the invoice is in CSV, XML, or PDF as required.
- Reduce File Size: Large files may cause failures. Try compressing the file before uploading.
- Try a Different Browser: Switch to Google Chrome or Firefox for better compatibility.
7. NPWP (Tax ID) Registration Issues
Issue:
- Cannot register a new NPWP for foreign nationals.
- Errors when updating NPWP status.
Solutions:
- Check Required Documents: Ensure you have uploaded necessary identity documents (e.g., passport for foreign nationals).
- Try Again Outside Peak Hours: System congestion may cause failures during busy hours.
- Verify with Tax Office: If issues persist, contact the nearest tax office (KPP).
8. Coretax Website Downtime (404 Error)
Issue:
- Coretax website (
coretaxdjp.pajak.go.id) shows a “404 Page Not Found” error. - Website is inaccessible due to downtime or incorrect URL.
Solutions:
- Check If the Website is Down: Visit the official DJP social media or website to check for downtime announcements.
- Verify the URL: Ensure you are using the correct link. Sometimes, official links may change.
- Try a Different Device or Network: Some connectivity issues may be specific to your ISP or device.
- Retry After Some Time: The site may be temporarily down due to maintenance.
9. 500 Internal Server Error
Issue:
- A “500 Internal Server Error” message appears when opening specific menus in Coretax.
- The system freezes or fails to load pages after login.
Solutions:
- Access Outside Peak Hours: The 500 error usually spikes during high-traffic periods like tax deadlines. Try accessing the system early in the morning or late at night.
- Update Your Browser: Use the latest version of Google Chrome or Mozilla Firefox. Outdated browsers trigger compatibility failures with Coretax.
- Clear Cache and Cookies: Go to Chrome Settings > Privacy and Security > Clear Browsing Data. Select cookies and cached images, then clear.
- Switch to Incognito Mode: Open Coretax in a private window to rule out extension conflicts.
- Retry After a Few Minutes: If the server is overloaded, waiting 10 to 15 minutes before retrying often resolves the issue.
10. NIK-NPWP Mismatch Causing Login Failure
Issue:
- Login fails repeatedly even though the email and password are entered correctly.
- The system rejects credentials without a clear error message.
Solutions:
- Check NIK-NPWP Pairing: Coretax requires your NIK (National Identity Number) to be matched with your NPWP before login works. If this pairing is incomplete, authentication will fail.
- Complete the Pairing Process: Log in to DJP Online (djponline.pajak.go.id) and verify that your NIK and NPWP are linked under your profile.
- Use Password Reset: If your credentials are correct but login still fails, use the forgot password option to reset and try again.
- Contact DJP Support: If pairing issues persist, call Kring Pajak at 1500200 or visit the nearest tax office (KPP) with your identity documents.
11. “Save Invalid” Error When Submitting Tax Invoices (Faktur Pajak)
Issue:
- The system shows a “save invalid” message after filling out the tax invoice form completely.
- Invoice data disappears or fails to save despite appearing correct.
Solutions:
- Review All Required Fields: Go through every field in the invoice form. Even one empty mandatory field triggers a save invalid error.
- Check Date Format: Coretax requires a specific date format. An incorrect format in the invoice date field is one of the most common causes of this error.
- Save as Draft First: Before submitting, save the invoice as a draft. This lets the system validate the data without a full submission attempt.
- Log Out and Log Back In: Session issues can cause save failures. Log out completely, clear your browser cache, and log in again before retrying.
- Avoid Multiple Open Tabs: Running multiple Coretax sessions at the same time causes conflicts that lead to save errors. Use a single browser tab.
12. Face Validation Failure During Electronic Certificate Activation
Issue:
- The face validation step fails during e-Certificate (Sertifikat Elektronik) setup.
- The system does not recognize the face scan or rejects it repeatedly.
Solutions:
- Improve Lighting Conditions: Face validation requires good lighting. Sit facing a light source directly so your face is evenly lit. Avoid backlighting.
- Remove Face Coverings: Take off any mask, glasses, or head coverings that may interfere with facial recognition.
- Match Your e-KTP Photo: The system compares your face against your e-KTP data. Make sure your appearance closely matches your ID photo.
- Use a Higher Quality Camera: A low-resolution webcam or front camera can cause validation failures. Switch to a device with a better camera if possible.
- Try Manual Verification: If face validation continues to fail after multiple attempts, visit your nearest tax office (KPP) to complete identity verification in person.
13. Cannot Add Role or Related Party in Coretax
Issue:
- Errors appear when trying to add a company director, tax representative, or related party to the Coretax account.
- The system rejects the submission without a clear reason.
Solutions:
- Verify Identity Data is Synced: The related party’s NIK must be registered and matched with their NPWP in the DJP system before they can be added. Unsynced data is the most common cause of this error.
- Check Input Accuracy: Double-check the NIK, NPWP, and name of the person you are adding. Any mismatch with DJP records causes the addition to fail.
- Wait for Data Sync to Complete: If the person recently updated their identity data in DJP Online, the sync may take up to 24 hours. Try again the next day.
- Contact DJP Support: If the error persists after verifying all data, contact Kring Pajak at 1500200 with the relevant NPWP details ready.
14. Session Timeout and Data Loss During Input
Issue:
- Filled-in form data disappears before submission.
- The system logs out automatically mid-process, causing all entered data to be lost.
Solutions:
- Save Data Frequently: Use the draft or save option after completing each section of a form. Do not wait until the form is fully complete to save for the first time.
- Use a Stable Internet Connection: Unstable connections cause session drops, which trigger automatic logouts. Switch to a wired connection or a more reliable network if available.
- Avoid Opening Multiple Tabs: Running several Coretax tabs at the same time accelerates session expiry. Stick to a single active tab per session.
- Set a Timer: Coretax sessions expire after a period of inactivity. If you are filling out a long form, save your progress every 10 to 15 minutes to avoid losing data.
- Prepare Data Offline First: Draft all the information you need in a separate document before logging into Coretax. This lets you paste data quickly and reduces the risk of session timeout.
15. Tax Documents and Bukti Potong PDF Not Loading
Issue:
- PDF documents do not appear after submission.
- Withholding tax receipts (Bukti Potong) or other generated documents fail to download.
Solutions:
- Enable Browser Pop-ups: Coretax generates PDFs in a new window. If your browser blocks pop-ups, the document will not appear. Go to Chrome Settings > Privacy and Security > Site Settings > Pop-ups and redirects, and allow coretaxdjp.pajak.go.id.
- Wait Before Downloading: Document generation takes time on the server side, especially during peak hours. Wait 3 to 5 minutes after submission before attempting to download.
- Refresh the Document Page: If the PDF link appears but does not load, refresh the page and try the download again.
- Try a Different Browser: Switch to Mozilla Firefox or Microsoft Edge if Chrome is not loading the PDF correctly.
- Check Your Download Folder: The PDF may have downloaded automatically without a visible prompt. Check your default downloads folder before retrying.
If none of the above solutions resolve your issue, check DJP’s official announcements (DJP Twitter) or contact their support team. Coretax is a new system undergoing improvements, and the Directorate General of Taxes (DJP) is actively working on fixes to ensure smoother operations for taxpayers.
This Coretax system errors troubleshooting guide aims to help users efficiently resolve common issues and ensure seamless tax compliance.