
Samsung Galaxy Tab E 9.6
The latest firmware for Samsung Galaxy Tab E 9.6 (SM-T561) is T561XXU0ARB1 with Android 4.4.4 (KitKat), released on March 7, 2018 for 1 region (CSC). Every official firmware build for SM-T561, 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/T561XXU0ARB1
All 35 builds in our database run Android 4.4.4 (KitKat). The newest build, T561XXU0ARB1, was released on March 7, 2018. No new build has appeared for 105 months, so regular updates for this model have most likely ended.
Box codes of SM-T561 for different colors and markets. Firmware is chosen by the model code SM-T561 and your region (CSC), not by the SKU.

SM-T561Y

SM-T560

SM-T550X

SM-T575

SM-T570
The newest firmware for SM-T561 runs Android 4.4.4 (KitKat): build T561XXU0ARB1, released on March 7, 2018.
The latest build for SM-T561, T561XXU0ARB1, was released on March 7, 2018 (8 years ago).
SM-T561 has had no new firmware for 105 months, so regular updates have most likely ended.
Yes, all firmware files for SM-T561 are 100% official, original, and obtained directly from Samsung servers.
To flash SM-T561, 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-T561.