Declension table of bhavitavya

Neuter	Singular	Dual	Plural
Nominative	bhavitavyam	bhavitavye	bhavitavyāni
Vocative	bhavitavya	bhavitavye	bhavitavyāni
Accusative	bhavitavyam	bhavitavye	bhavitavyāni
Instrumental	bhavitavyena	bhavitavyābhyām	bhavitavyaiḥ
Dative	bhavitavyāya	bhavitavyābhyām	bhavitavyebhyaḥ
Ablative	bhavitavyāt	bhavitavyābhyām	bhavitavyebhyaḥ
Genitive	bhavitavyasya	bhavitavyayoḥ	bhavitavyānām
Locative	bhavitavye	bhavitavyayoḥ	bhavitavyeṣu

Compound bhavitavya -

Adverb -bhavitavyam -bhavitavyāt