820: Error description not available
Cause:
The transaction date is more than 180 days and is not eligible for e-Way Bill generation.
Resolution:
On the e-Way Bill Details screen, verify that the dates under e-Way Bill Details and Transport Details are not more than 180 days with respect to the transaction date.
For example, if you are generating the e-Way Bill on 5 October 2026, the transaction date should not be earlier than 8 April 2026.
| Transaction date | e-Way Bill generation date | Result |
| 5 Apr 2026 | 5 Oct 2026 | Error 820 |
| 8 Apr 2026 | 5 Oct 2026 | No error as e-Way Bill generation is within 180 days. |
| 15 Aug 2026 | 5 Oct 2026 | No error as e-Way Bill generation is within 180 days. |
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