I found LOTS of ideas just by googling this: accounting thesis topic
If you are just looking for ideas, googling gets good results. I wish I was knowledgeable enough to tell you what is happening currently in research pertaining to the field... but I'm not! If you search a database of professional journal articles, you can read some recent ones and see what is included in the LITERATURE REVIEW. That is the easiest way to catch up with what is going on in scholarly discourse about accounting topics. Just read some other people's lit reviews.