Hola Jessica
Yes, to express "to have just done something" we use the whole structure "acabar de +infinitive", so you need to conjugate acabar in the present and then add "de" plus infinitive.
For example:
"Acabo de hablar con Juan" (I've just spoken with Juan)
"Ella acaba de llegar a casa" (She's just arrived home)
I hope this helps,
Gracias y un saludo
Inma