Declension table of ?ahaṅkartavya

Neuter	Singular	Dual	Plural
Nominative	ahaṅkartavyam	ahaṅkartavye	ahaṅkartavyāni
Vocative	ahaṅkartavya	ahaṅkartavye	ahaṅkartavyāni
Accusative	ahaṅkartavyam	ahaṅkartavye	ahaṅkartavyāni
Instrumental	ahaṅkartavyena	ahaṅkartavyābhyām	ahaṅkartavyaiḥ
Dative	ahaṅkartavyāya	ahaṅkartavyābhyām	ahaṅkartavyebhyaḥ
Ablative	ahaṅkartavyāt	ahaṅkartavyābhyām	ahaṅkartavyebhyaḥ
Genitive	ahaṅkartavyasya	ahaṅkartavyayoḥ	ahaṅkartavyānām
Locative	ahaṅkartavye	ahaṅkartavyayoḥ	ahaṅkartavyeṣu

Compound ahaṅkartavya -

Adverb -ahaṅkartavyam -ahaṅkartavyāt