What happens if I have quoted incorrect PAN in the tax payment challan used for depositing my advance / self-assessment tax?

In such cases, your tax payment details will not be reflected in Form 26AS. It is important for you to correctly state your PAN in the tax payment challan. For correction in challan within 7 days, you need to approach the bank and after 7 days, you may approach the jurisdictional assessing officer.