Declension table of ?tartavya

Neuter	Singular	Dual	Plural
Nominative	tartavyam	tartavye	tartavyāni
Vocative	tartavya	tartavye	tartavyāni
Accusative	tartavyam	tartavye	tartavyāni
Instrumental	tartavyena	tartavyābhyām	tartavyaiḥ
Dative	tartavyāya	tartavyābhyām	tartavyebhyaḥ
Ablative	tartavyāt	tartavyābhyām	tartavyebhyaḥ
Genitive	tartavyasya	tartavyayoḥ	tartavyānām
Locative	tartavye	tartavyayoḥ	tartavyeṣu

Compound tartavya -

Adverb -tartavyam -tartavyāt