How to work out Qatar Airways award taxes/fees

Most of the time with airline booking sites, you can use a Dummy booking to work out the cost of an award booking Poiints and taxes/fees

Qatar have recently changed this on their website to only show you the points and if you try and go any further without enough points they come back with

“Not enought points to continue with this booking”

The workaround I have found is to use British airways sites which code share with Qatar on Avios to get a rough estimate on qatar award taxes/fees