Many a time, I have missed Salahs (Prayers) and have not made up for them. Sometimes, I offered Salah without being in a state of Taharah (ritual purification).
In fact, I do not remember the number of the prayers I missed. Should I make up for them, and how?
You should repent to Allah sincerely and perform as many of the supererogatory prayers and other acts of worship as you can. You should also supplicate to Allah (Part No. 5; Page No. 45) (Glorified be He) hoping that He will forgive you. You should seriously resolve to maintain performance of Salah at its due time, may Allah forgive you and accept your repentance. Allah (Exalted be He) says:
Verily, the good deeds remove the evil deeds (i.e. small sins).
He (Glorified be He) also says:
And all of you beg Allâh to forgive you all, O believers, that you may be successful
The Prophet (peace be upon him) said:
Tawbah (repentance to Allah) wipes out all the previous misdeeds.
It is enough to repent and then you are not obliged to make up for the Salah you neglected intentionally. Indeed, neglecting Salah is an act of major Kufr (disbelief); therefore, its Kaffarah (expiation) is to turn in repentance to Allah.May Allah grant us success. May peace and blessings be upon our Prophet Muhammad, his family, and Companions.