Declension table of ?karitavya

Neuter	Singular	Dual	Plural
Nominative	karitavyam	karitavye	karitavyāni
Vocative	karitavya	karitavye	karitavyāni
Accusative	karitavyam	karitavye	karitavyāni
Instrumental	karitavyena	karitavyābhyām	karitavyaiḥ
Dative	karitavyāya	karitavyābhyām	karitavyebhyaḥ
Ablative	karitavyāt	karitavyābhyām	karitavyebhyaḥ
Genitive	karitavyasya	karitavyayoḥ	karitavyānām
Locative	karitavye	karitavyayoḥ	karitavyeṣu

Compound karitavya -

Adverb -karitavyam -karitavyāt