Without knowing which canton you live in, number of dependents, etc, not much people can tell you.
Best thing though is to contact your cantonal tax office and see if they can have someone go over your tax return with you so you can fill it in more easily yourself. Usually they’re happy to help.
I assume atm having a B permit you’re taxed at source; so be aware that changing to filling in a tax return might mean your taxes increase instead of decreasing. That will all depend on what other sources of income/assets/etc you have that would have to be declared.
Edit: Seeing as you already have a tax advisor, talk to them.