Fee option?
1 min
The app doesn't allow me to move to the next step if I choose the consultation fee option "yes". How to step ahead?

It means, if you Consult for Free, then why the need to add Tax details and likewise, maybe.
Yes, If an expert opts to go pro-bono, they will not be required to add any of the additional details as those details are primarily for users expecting to charge a fee. Pro-Bono experts can continue receiving session requests without any interruption even if they have steps pending.
Hope this helps!