
Samsung Galaxy Tab4 10.1
The latest firmware for Samsung Galaxy Tab4 10.1 (SM-T530) is T530XXS1BRH1 with Android 4.4.2 (KitKat), released on August 13, 2018 for 23 regions (CSC). Every official firmware build for SM-T530, 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/T530XXS1BRH1
All 37 builds in our database run Android 4.4.2 (KitKat). The newest build, T530XXS1BRH1, was released on August 13, 2018. No new build has appeared for 99 months, so regular updates for this model have most likely ended.
Box codes of SM-T530 for different colors and markets. Firmware is chosen by the model code SM-T530 and your region (CSC), not by the SKU.

SM-T530X

SM-T537A

SM-T535

SM-T532

SM-T638B
The newest firmware for SM-T530 runs Android 4.4.2 (KitKat): build T530XXS1BRH1, released on August 13, 2018.
The latest build for SM-T530, T530XXS1BRH1, was released on August 13, 2018 (8 years ago).
SM-T530 has had no new firmware for 99 months, so regular updates have most likely ended.
Yes, all firmware files for SM-T530 are 100% official, original, and obtained directly from Samsung servers.
To flash SM-T530, 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-T530.