Brazilian native Accountant to validate invoice for Brazilian customers

We are a software company that supply an app, SpeedInvoice, that you can download from Apple or Google. Please have a look at the app. I need you to validate that we meet Brazilian invoice requirements. The process will be that I will send you a Brazilian invoice, you will review that terms used and information provided on our invoice meets the standard Brazilian invoicing requirements. We will also need to know if there are any special scenarios that we need comply with Brazilian tax law. We have done this before with other countries and it is a quick process, around an hour is needed of your time.