Declension table of tatva

Neuter	Singular	Dual	Plural
Nominative	tatvam	tatve	tatvāni
Vocative	tatva	tatve	tatvāni
Accusative	tatvam	tatve	tatvāni
Instrumental	tatvena	tatvābhyām	tatvaiḥ
Dative	tatvāya	tatvābhyām	tatvebhyaḥ
Ablative	tatvāt	tatvābhyām	tatvebhyaḥ
Genitive	tatvasya	tatvayoḥ	tatvānām
Locative	tatve	tatvayoḥ	tatveṣu

Compound tatva -

Adverb -tatvam -tatvāt