Declension table of ?sādhitavya

Neuter	Singular	Dual	Plural
Nominative	sādhitavyam	sādhitavye	sādhitavyāni
Vocative	sādhitavya	sādhitavye	sādhitavyāni
Accusative	sādhitavyam	sādhitavye	sādhitavyāni
Instrumental	sādhitavyena	sādhitavyābhyām	sādhitavyaiḥ
Dative	sādhitavyāya	sādhitavyābhyām	sādhitavyebhyaḥ
Ablative	sādhitavyāt	sādhitavyābhyām	sādhitavyebhyaḥ
Genitive	sādhitavyasya	sādhitavyayoḥ	sādhitavyānām
Locative	sādhitavye	sādhitavyayoḥ	sādhitavyeṣu

Compound sādhitavya -

Adverb -sādhitavyam -sādhitavyāt