Under OLTAS (On Line Tax Accounting System), the physical challans of all Direct Tax payments received from the deductors / taxpayers are digitized on daily basis by the collecting banks and the data transmitted to TIN (Tax Information Network) through link cell. At present, the banks are permitted to correct data relating to three fields only i.e. amount, major head code and name. The other errors can be corrected only by the assessing officers.
NSDL receives tax collection data as uploaded by the bank. NSDL is not authorized to carry out any changes in the data sent by the bank to TIN.
NSDL receives tax collection data as uploaded by the bank. NSDL is not authorized to carry out any changes in the data sent by the bank to TIN.
The fields that can be corrected by the Taxpayer through Bank are tabulated below:
| Sl. No. | Type of Correction on Challan | Period for correction request (in days) |
| 1 | PAN/TAN | Within 7 days from challan deposit date |
| 2 | Assessment Year | Within 7 days from challan deposit date |
| 3 | Total Amount | Within 7 days from challan deposit date |
| 4 | Major Head | Within 3 months from challan deposit date |
| 5 | Minor Head | Within 3 months from challan deposit date |
| 6 | Nature of Payment | Within 3 months from challan deposit date |
1. Above correction mechanism is applicable only for physical challans with deposit date greater than equal to September 1, 2011.
2. Any correction request initiated by the taxpayer after the time limit specified above shall be rejected by Bank.
3. For challans with challan deposit date from September 1, 2011 to September 30, 2011, the time limit for correction in TAN/PAN, Assessment Year and Amount will be within 45 days from challan deposit date.
4. The fields that can be corrected and the entity authorized to carry out corrections on challan with deposit date less than September 1, 2011 are as below:
2. Any correction request initiated by the taxpayer after the time limit specified above shall be rejected by Bank.
3. For challans with challan deposit date from September 1, 2011 to September 30, 2011, the time limit for correction in TAN/PAN, Assessment Year and Amount will be within 45 days from challan deposit date.
4. The fields that can be corrected and the entity authorized to carry out corrections on challan with deposit date less than September 1, 2011 are as below:
| Sl. No. | Type of Correction on Challan | Performed By |
| 1 | PAN/TAN | Assessing Officer |
| 2 | Assessment Year | Assessing Officer |
| 3 | Major Head | Assessing Officer /Bank |
| 4 | Minor Head | Assessing Officer |
| 5 | Nature of Payment | Assessing Officer |
| 6 | Total Amount | Bank |
| 7 | Name | Bank |
5. For rectifications in challans paid through online mode (internet challan) , taxpayer may contact their concerned Assessing Officer (AO) of the Income Tax Department (ITD).
