So Star Alliance gives you a tax estimate upfront (usually around $1000 for me so far). Can I expect oneworld to be about the same? Specifically, on the posted fare of $3,200 on a 4 continent, economy class ticket originating in Uganda.

I tried to run a test by putting a sample itinerary into the oneworld online tool but it had an error twice right after I clicked Book Now, so I can't think of anything else except asking here.

Thank you very much if you are able to help.