CRA has assembled its Top 5 List of potential pitfalls. From missing slips to filing late (or not at all), we see these things all the time. Whether you have one T4 for the current year or 9 years of business returns to file, we can take care of you.
When you file with Pi, we are up to date on the latest deductions and credits and will make sure you get to keep as much of your money as you legally can. If you are missing slips from your employer or financial institution, we can often download those directly from CRA to avoid the penalties associated with forgetting to report income. We will also bundle up all of your receipts and slips with the tax return we give back to you so everything is in one easy, convenient package.
Reference: http://www.cra-arc.gc.ca/nwsrm/txtps/2016/tfsk14-eng.html