In the name of Allah the Most Gracious and the Most Merciful.
Yes you may as we are required to pay back the fast that we missed. Abu Salama r.a reported: I heard Aisha r.a said: I had to complete so of the fasts of Ramadan but i could not do it but during the month of Sha’ban due to my duties to the Prophet. (Narrated by Muslim)
Allah knows best.