Declension table of ?kṛtakartavya

Masculine	Singular	Dual	Plural
Nominative	kṛtakartavyaḥ	kṛtakartavyau	kṛtakartavyāḥ
Vocative	kṛtakartavya	kṛtakartavyau	kṛtakartavyāḥ
Accusative	kṛtakartavyam	kṛtakartavyau	kṛtakartavyān
Instrumental	kṛtakartavyena	kṛtakartavyābhyām	kṛtakartavyaiḥ kṛtakartavyebhiḥ
Dative	kṛtakartavyāya	kṛtakartavyābhyām	kṛtakartavyebhyaḥ
Ablative	kṛtakartavyāt	kṛtakartavyābhyām	kṛtakartavyebhyaḥ
Genitive	kṛtakartavyasya	kṛtakartavyayoḥ	kṛtakartavyānām
Locative	kṛtakartavye	kṛtakartavyayoḥ	kṛtakartavyeṣu

Compound kṛtakartavya -

Adverb -kṛtakartavyam -kṛtakartavyāt