How do you change a stop light on Skoda fabia?

I only have the answer for the rear lights. I hold this info from the technical workshop manual I had to buy in order to find out. Still beats being ripped off by the local garage...

Before you do anything, please ensure you wear insulated gloves as you may come in contact with live wires.

Open the boot of the car and look at the part of the boot which is directly behind the tail light. There is a fixing nut there which looks like a standard screw. Unscrew it and carefully remove tail light from the body of the car. Now disconnect the main connector that links all the bulbs to the rest of the car. You can now safely remove the bulb from the casing and replace it. When doen, reconnect the connector and run trhough these instructiOSn in reverse order.

Bulb references :

Light bulb for turn signal : PY21W 12V 21W

Left side Light bulb for fog light/right side light bulb for reversing light : P21W 12V 21W

Light bulb for tail light : PY21W 12V 21W

Light bulb for brake light : PY21W 12V 21W

Good luck