
Samsung Galaxy Tab S4
The latest firmware for Samsung Galaxy Tab S4 (SM-T837A) is T837AUCS6CVE1 with Android 10, released on May 17, 2022 for 1 region (CSC). Every official firmware build for SM-T837A, 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/T837AUCS6CVE1
SM-T837A started on Android 9 and has received 1 major Android upgrade; it now runs Android 10. The newest build, T837AUCS6CVE1, was released on May 17, 2022. No new build has appeared for 54 months, so regular updates for this model have most likely ended.
Specifications of SM-T837, a regional variant of the same device. Chipset and SIM lines are left out: they can differ by region.

SM-T290N

SM-T537A

SM-T800X

SM-T807V

SM-T230X

SM-T230NY

SM-T237V

SM-T232
The newest firmware for SM-T837A runs Android 10: build T837AUCS6CVE1, released on May 17, 2022.
The latest build for SM-T837A, T837AUCS6CVE1, was released on May 17, 2022 (4 years ago).
SM-T837A has had no new firmware for 54 months, so regular updates have most likely ended.
Yes, all firmware files for SM-T837A are 100% official, original, and obtained directly from Samsung servers.
To flash SM-T837A, 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-T837A.