Thank you for all your responses.
I talked to my boss, and she made it clear that she is not willing to report my full income. She said that if I want to get an APRC eventually, she'll start reporting whatever the minimum for that is, which is still only about 2/3 of my actual salary. I'm really nervous about being in violation of the law, and very worried about the possible consequences that could result. I'm unsure what to do. Is this worth quitting my job over? Right now my boss reports my income as the minimum for getting an ARC, which is in the high 20,000's per month; is this low enough to arouse the suspicion of the tax bureau? What can they do if the suspect something?
I know some of these questions might not have any answers, but any input is appreciated.