You can correct the details by visiting the NSDL website. Visit the website here and submit the form.  Under application type select ‘Changes or Correction in existing PAN DATA’. Under category select, the appropriate option, like an individual taxpayer must select ‘INDIVIDUAL’. Fill in the applicant information correctly, enter the captcha code, and submit the form.  On a successful PAN verification, you will receive the confirmation and corrected PAN card from NSDL.