Q: While performing four rakaats Sunnah I forgot and completed two rakaats with salam. My question is shall I repeat all four rakaats or just offer two rakaats.
A: If it was not Sunnat-e-muakkadah then you do not have to repeat all the four rakaats.
And Allah Ta’ala (الله تعالى) knows best.
Mufti Ebrahim Salejee (Isipingo Beach)