TaxTMI 
TaxTMI 
TaxTMI 
The long-awaited GST Appellate Tribunal (GSTAT) portal has officially gone live, allowing taxpayers and consultants to start filing pending GST appeals. This marks an important milestone in GST dispute resolution, aligning with the structured and technology-driven compliance framework highlighted across ICAI’s GST Bare Law and Background Material.
Key Highlights
GSTAT has begun accepting appeals from taxpayers and practitioners.
Staggered filing windows start from 31 October 2025.
Final deadline for all backlog appeals is 30 June 2026.
Filing requires use of the offline Excel utility and uploading documents in PDF format (max 20 MB).
Appeal fees can be paid online or offline, and the appeal must be authenticated via DSC or Aadhaar e-sign.
Acknowledgement is sent instantly via SMS and email.
Documents Required
1. Pre-deposit calculation sheet Copy of APL-04 order (if not auto-populated)
2. Fee payment challan (for offline payments)
3. Vakalatnama/authorisation
4. Supporting documents related to the dispute
Process Overview
Taxpayers can log in using their GSTIN ID or Back Office ID, complete each section of the appeal form, upload documents, pay the fee, and submit.
The portal also provides a facility to check the assigned filing window using the ARN/CRN.
Flexibility for Late Filers
Even if a taxpayer misses their allocated slot, appeals can still be filed anytime before 30 June 2026.
Conclusion
With GSTAT finally live, this is the best time for taxpayers to get their appeal paperwork and gather all supporting documents. The staggered filing windows give some breathing room, but the real advantage goes to those who file early—before the inevitable traffic hits in mid-2026. Start preparing now and stay ahead of the rush.