
Samsung Galaxy Tab A (2016)
The latest firmware for Samsung Galaxy Tab A (2016) (SM-T585N0) is T585N0KOS1CTJ1 with Android 7.0 (Nougat), released on November 24, 2020 for 1 region (CSC). Every official firmware build for SM-T585N0, 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/T585N0KOS1CTJ1
All 9 builds in our database run Android 7.0 (Nougat). The newest build, T585N0KOS1CTJ1, was released on November 24, 2020. No new build has appeared for 72 months, so regular updates for this model have most likely ended.
Specifications of SM-T585N, a regional variant of the same device. Chipset and SIM lines are left out: they can differ by region.

SM-T585M

SM-T587P

SM-T583

SM-T580

SM-T597V
The newest firmware for SM-T585N0 runs Android 7.0 (Nougat): build T585N0KOS1CTJ1, released on November 24, 2020.
The latest build for SM-T585N0, T585N0KOS1CTJ1, was released on November 24, 2020 (5 years ago).
SM-T585N0 has had no new firmware for 72 months, so regular updates have most likely ended.
Yes, all firmware files for SM-T585N0 are 100% official, original, and obtained directly from Samsung servers.
To flash SM-T585N0, 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-T585N0.