Declension table of ?kartitavya

Masculine	Singular	Dual	Plural
Nominative	kartitavyaḥ	kartitavyau	kartitavyāḥ
Vocative	kartitavya	kartitavyau	kartitavyāḥ
Accusative	kartitavyam	kartitavyau	kartitavyān
Instrumental	kartitavyena	kartitavyābhyām	kartitavyaiḥ kartitavyebhiḥ
Dative	kartitavyāya	kartitavyābhyām	kartitavyebhyaḥ
Ablative	kartitavyāt	kartitavyābhyām	kartitavyebhyaḥ
Genitive	kartitavyasya	kartitavyayoḥ	kartitavyānām
Locative	kartitavye	kartitavyayoḥ	kartitavyeṣu

Compound kartitavya -

Adverb -kartitavyam -kartitavyāt