Indonesia.travel lists admission at IDR 30,000 per adult aged 10 and over, and IDR 15,000 per child aged 5–9. The listing does not state a separate rate by nationality. Confirm the current charge, what access is included, and any additional fees at the ticket counter.
The same official visitor listing gives daily opening hours of 06:30–18:30 WITA (Bali time). Address: Desa Kemenuh, Sukawati District, Gianyar Regency, Bali, Indonesia.
Visitor information and listed prices: https://www.indonesia.travel/id/id/destination/bali-nusa-tenggara/bali/tegenungan-waterfall
Map: https://www.google.com/maps/search/?api=1&query=Tegenungan+Waterfall%2C+Kemenuh%2C+Sukawati%2C+Gianyar%2C+Bali
Photo: Eja21, “Cascade Tegenungan.jpg”, Wikimedia Commons, CC0 1.0: https://commons.wikimedia.org/wiki/File:Cascade_Tegenungan.jpg