
Samsung Galaxy Tab S4
The latest firmware for Samsung Galaxy Tab S4 (SM-T835N) is T835NKOU5CVG2 with Android 10, released on August 9, 2022 for 1 region (CSC). Every official firmware build for SM-T835N, newest first: one row per build with all regions (CSC) that received it.
Each firmware build has its own page at https://samfirm.shop/build/{PDA}, where {PDA} is the build number from the list above. Example: https://samfirm.shop/build/T835NKOU5CVG2
SM-T835N started on Android 8 and has received 2 major Android upgrades; it now runs Android 10. The newest build, T835NKOU5CVG2, was released on August 9, 2022. No new build has appeared for 51 months, so regular updates for this model have most likely ended.
Box codes of SM-T835N for different colors and markets. Firmware is chosen by the model code SM-T835N and your region (CSC), not by the SKU.

SM-T290N

SM-T537A

SM-T800X

SM-T807V

SM-T230X

SM-T230NY

SM-T237V

SM-T232
The newest firmware for SM-T835N runs Android 10: build T835NKOU5CVG2, released on August 9, 2022.
The latest build for SM-T835N, T835NKOU5CVG2, was released on August 9, 2022 (4 years ago).
SM-T835N has had no new firmware for 51 months, so regular updates have most likely ended.
Yes, all firmware files for SM-T835N are 100% official, original, and obtained directly from Samsung servers.
To flash SM-T835N, you need to download the appropriate firmware, put your device into Download Mode, and use the Odin tool to load the BL, AP, CP, and CSC files.
Downgrading is only possible if the bootloader version (binary bit) of the old firmware matches the current one. Always check the binary version before flashing SM-T835N.