(Part No. 6; Page No. 46)
Any Mukallaf (person meeting the conditions to be held legally accountable for their actions) who abandons Salah and Sawm intentionally, is not required to make up for the missed prayers, but should repent and return to Allah (Glorified and Exalted be He) and draw closer to Allah through increasing good deeds, Du`a' (supplication) and offering Sadaqah (voluntary charity), for the Prophet (Peace be upon him) said,
Penitence wipes out all misdeeds done before it, and so does Islam.
It is known that abandoning Salah is major Kufr (disbelief that takes the Muslim out of Islam), for the Prophet (peace be upon him) said:
The covenant that distinguishes between us and them (the disbelievers) is Salah. Anyone who abandons it has committed Kufr (disbelief).
This is in addition to other pieces of evidence. So if a person who is falling short offers repentance, he does not need to make up for the missed prayers or fasts according to the legal evidence cited and other legal proofs in accordance with the most correct view of scholars.May Allah grant us success. May peace and blessings be upon our Prophet Muhammad, his family, and Companions.