Overscan issue with RX480 and TCL 50S425 Windows 10

[Spun Ducky]

So helping a family member out with their new computer and at 4k on this tv it overscans. Normally I would just flip a setting in the tv or the radeon driver suite but it seems the hdmi slider is missing. Does anyone have an idea on how to correct overscan on this particular tv or where they moved it in the latest amd drivers?

 

[Armenius]

Is the TV running in PC mode?
Did you change the input icon on the TV to the computer?
Do you have picture size on the TV set to auto?