Peace be upon you. According to Ayatollah Khamenei and Ayatollah Sistani: If the tattoo or eyebrow enhancement prevents water from reaching the skin or the eyebrow during ablution (wudu) or washing (ghusl), then it is not valid for these rituals. However, if it is beneath the skin, it is permissible in itself and does not affect ablution, washing, or prayer. If the tattoo is considered an adornment, it must be covered from the sight of non-mahram individuals.