Question: If one deliberately breaks his fast in Ramadan what is the kaffarah? Someone told me it is tawba and someone told me it is fasting 60 days! Which one is it?
Answer: If you deliberately broke fasting in Ramadan without an excuse, by eating something nutritious, or intercourse, then they were both right. You have to repent and you have to make kaffarah. The kaffaarah is to free a slave, and if unable to fast 2 consecutive months, and if unable to do any of that to feed 60 poor people.
See also this link and scroll down for the article on fasting.
... and Allah knows best.