How can one make up for a Ramadan fast day after ten years have passed since breaking it and not being able to make it up previously?

If you broke your fast in Ramadan without a valid excuse, you must repent sincerely and make up for the days you missed.

If you delay making up these fasts beyond their due time (from one Ramadan to the next), you must feed one poor person for each day you owe, unless your breaking of the fast was due to sexual intercourse, in which case the major expiation is required of you.