Where can I find the Query or the tables that bring the data from the Trial Balance Report scheduled process?
Are you asking about a Fusion product? If it's for a cloud Fusion product, you should ask in the forum looking after that product because you are asking about data and not about Publisher as a tool.
Fusion is covered in https://community.oracle.com/customerconnect/ , there are many categories, find the best match for your question.
If you aren't asking about a Fusion product, you will need to provide more details. Because Publisher is just a technical solution, it doesn't come with any data out of the box.