Shaykh Abu Abdir Rahmaan Yahyaa bin Alee Al-Hajooree was asked:
The one who left off fasting deliberately without an excuse, but due to work in the years that have past, is it upon him to make it up?
“Making up the fast is only for the one who left it off for an excuse. This excuse is like travelling, sickness, menstruation, and post-natal bleeding. As for the one who left it off deliberately, then there is nothing upon him except repentance to Allah, the Exalted”
[al-‘Athab al-Ma’een pg. 53]
Faisal Ibn Abdul Qaadir Ibn Hassan