To help narrow down the exact file you need, could you share a few details? What is the from the back of your TV?
When searching for firmware, it is always safest to begin with official sources:
The safest way to get firmware is directly through your TV's internet connection: link download tcl firmware for all models
Before you search for or download any firmware, you must know your TV’s exact information. Installing firmware built for a different board version—even if it's visually the exact same TV model—can permanently brick your television.
Complete Guide: How to Find and Download TCL Firmware for All Models To help narrow down the exact file you
Release the button when the "Software Updating" screen appears.
You can also navigate to Settings > System > About or Settings > Device Preferences > About on your TV to view your software version, build number, and specific model code. Two Ways to Update Your TCL Firmware Two Ways to Update Your TCL Firmware Search
Search for "TCL Android TV Firmware" on XDA. Many developers maintain threads with mirrors to Google Drive and MediaFire containing older versions if you need to "downgrade" for better performance. List of Common TCL Platforms
Downloading official firmware for your own device is legal. Distributing modified firmware not approved by Google/TCL is not.
Visit the TCL USA Support Center. Enter your model number in the search bar to access specific downloads, user manuals, and guide files.