How to contact assessment officer for change of asesment yr

Attached file give information on how to rectify the mistakes in challan.

Hi

Thanks for the reply. I had filled the challan online. I tried contacting the bank, they say they cannot do it. I went to the Income Tax Department and have submitted a request for change of assessment year with a copy of the counterfoil. Is there anythings else that I need to do?

Thanks...

Shikha