Declension table of ātmatattva

Neuter	Singular	Dual	Plural
Nominative	ātmatattvam	ātmatattve	ātmatattvāni
Vocative	ātmatattva	ātmatattve	ātmatattvāni
Accusative	ātmatattvam	ātmatattve	ātmatattvāni
Instrumental	ātmatattvena	ātmatattvābhyām	ātmatattvaiḥ
Dative	ātmatattvāya	ātmatattvābhyām	ātmatattvebhyaḥ
Ablative	ātmatattvāt	ātmatattvābhyām	ātmatattvebhyaḥ
Genitive	ātmatattvasya	ātmatattvayoḥ	ātmatattvānām
Locative	ātmatattve	ātmatattvayoḥ	ātmatattveṣu

Compound ātmatattva -

Adverb -ātmatattvam -ātmatattvāt