You don’t have an option for that in the Pan card online application

only one middle name single character is accepted in the first name and middle name min 3 join characters to be entered

To keep your father’s initial first and middle name in a PAN (Permanent Account Number) card, you will need to provide the initial first and middle name in the “Father’s Name” field while filling out the PAN card application form. You can abbreviate the first and middle name using their initial letter followed by a dot (e.g., M. K. Mohan).

Please note that the PAN card application form requires the full name of the father to be provided, but the abbreviated initial name can be used in the final PAN card.

feel free to reach us if you have any doubt