Mis padres estan en la sala.
A, Tacos is plural so "gusta" must be plural too.
Answer:
Yo no sabía que tú estabas. Si no, yo _hago__ papas a la huancaína.
I didn't know you were there. If not, I'll _make__ potatoes a la huancaína.
Sorry for the confusion!! I hope this helps!!
