This is a regular verb. It follows the conjugation pattern of the verb hablar.
PresentPresente
Todavía faltan dos sillas para la cena de mañana.
Two chairs are still missing for tomorrow's dinner.
PreteritePretérito indefinido
Ayer falté al trabajo porque estaba enfermo.
Yesterday I missed work because I was sick.
FutureFuturo
Mañana faltará leche si no compramos hoy.
Tomorrow there will be no milk if we don't buy some today.