Financial Software Questions? Ask IT Support for Answers ASAP
If you are concerned with a security problem and wish to request the card company change your number then you should call Customer Service of the issuing company. For example if your card is VISA, Call Visa Global Customer Care Services at 1-***-***-**** (within the U.S. or Canada).
If you are asking about changing your card number in some other site for payment purposes then you need let me know.