Declension table of ?ṭaṅkayitavya

Neuter	Singular	Dual	Plural
Nominative	ṭaṅkayitavyam	ṭaṅkayitavye	ṭaṅkayitavyāni
Vocative	ṭaṅkayitavya	ṭaṅkayitavye	ṭaṅkayitavyāni
Accusative	ṭaṅkayitavyam	ṭaṅkayitavye	ṭaṅkayitavyāni
Instrumental	ṭaṅkayitavyena	ṭaṅkayitavyābhyām	ṭaṅkayitavyaiḥ
Dative	ṭaṅkayitavyāya	ṭaṅkayitavyābhyām	ṭaṅkayitavyebhyaḥ
Ablative	ṭaṅkayitavyāt	ṭaṅkayitavyābhyām	ṭaṅkayitavyebhyaḥ
Genitive	ṭaṅkayitavyasya	ṭaṅkayitavyayoḥ	ṭaṅkayitavyānām
Locative	ṭaṅkayitavye	ṭaṅkayitavyayoḥ	ṭaṅkayitavyeṣu

Compound ṭaṅkayitavya -

Adverb -ṭaṅkayitavyam -ṭaṅkayitavyāt