Tawaf Al-Ifadah is the Tawaf performed by the pilgrim on the 10th of Dhul-Hijjah as the last formal rite of Hajj in Makkah after changing into street clothes. It is one the rituals of Hajj and if it is missed, the Hajj is void. Tawaf Al-Wada` is the Tawaf performed by the pilgrim just before leaving Makkah for his next destination. A pilgrim is permitted to delay Tawaf Al-Ifadah till the time of Tawaf Al-Wada` and to perform either of them.
In this regard, Sheikh Abdul-`Aziz ibn Baz, the late Mufti of Saudi Arabia, stated: There is nothing wrong in doing so. If a person delayed performing Tawaf Al-Ifadah and then when he wanted to travel he performed Tawaf Al-Ifadah after all other rituals of Hajj are done, his Tawaf Al-Ifadah suffices for Tawaf Al-Wada` (Farewell Tawaf). If he performed both of them, it would be much better. However, if he performed one of them while having the intention that this Tawaf is the Tawaf required for performing Hajj, then it is enough and he does not have to perform Tawaf Al-Wada`. The same ruling applies if he performs one Tawaf while intending Tawaf Al-Ifadah along with Tawaf Al-Wada`.
Allah Almighty knows best.