Declension table of ?karvitavya

Masculine	Singular	Dual	Plural
Nominative	karvitavyaḥ	karvitavyau	karvitavyāḥ
Vocative	karvitavya	karvitavyau	karvitavyāḥ
Accusative	karvitavyam	karvitavyau	karvitavyān
Instrumental	karvitavyena	karvitavyābhyām	karvitavyaiḥ karvitavyebhiḥ
Dative	karvitavyāya	karvitavyābhyām	karvitavyebhyaḥ
Ablative	karvitavyāt	karvitavyābhyām	karvitavyebhyaḥ
Genitive	karvitavyasya	karvitavyayoḥ	karvitavyānām
Locative	karvitavye	karvitavyayoḥ	karvitavyeṣu

Compound karvitavya -

Adverb -karvitavyam -karvitavyāt