This is a regular verb with a spelling change. It follows the conjugation pattern of the verb buscar.
Spelling Change: ce que - cé qué
PresentPresente
La profesora comunica las notas por correo.
The teacher communicates the grades by email.
PreteritePretérito indefinido
Ayer comuniqué la noticia a mi familia.
Yesterday I communicated the news to my family.
FutureFuturo
La empresa comunicará los resultados el lunes.
The company will announce the results on Monday.