E-Way Bill Extension & Vehicle Number Update Guide (2026 SOP)
E-Way Bill Extension & Vehicle Number Update Guide (2026 SOP)
Complete guide on E-Way Bill extension 8-hour window rules, Part B vehicle updates in Tally Prime, transporter assignment & breakdown SOP.
Who is this for: GST & Tax Compliance
Quick Summary: How Do You Extend an E-Way Bill and Update Vehicle Numbers?
Validity extensions can be requested within 8 hours BEFORE or 8 hours AFTER expiry. In Tally Prime, open e-Way Bill Report > Pending for Part B Updation. Press F7 (Update Part B), enter the new vehicle registration number, and press Alt+Z (Send to Portal). Multiple vehicle updates are permitted during valid movement.
- 8-Hour Extension Window: Can extend 8 hours before or 8 hours after expiry timestamp.
- Lifetime Limit: Maximum total lifetime extension cap of 360 days from generation.
- Tally Prime Shortcut: Select voucher > Press F7 (Update Part B) > Alt+Z (Exchange).
- Penalty Warning: Goods in transit with mismatched vehicle numbers risk 200% tax detention.
1. The 8-Hour Extension Rule Timeline
The diagram below illustrates the exact 16-hour statutory window for requesting E-Way Bill validity extensions:
| Time Window Relative to Expiry | Portal Action Permission | Required Details for Extension |
|---|---|---|
| 8 Hours BEFORE Expiry | ALLOWED (Pre-Expiry Extension) | Current Pin Code, Reason, Vehicle No. |
| EXACT EXPIRY TIMESTAMP (Midnight) | ALLOWED (Exact Expiration) | Current Location & Remaining Distance |
| 8 Hours AFTER Expiry | ALLOWED (Post-Expiry Grace) | Breakdown / Transshipment Reason |
| Beyond 8 Hours Post-Expiry | DISABLED (EWB Expired & Invalid) | Must generate new E-Way Bill (Section 129 risk) |
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