Thanks for joining this thread, @Anonymous, 

I appreciate you changing the fiscal year-end dates in your Trial Balance report and manually entered the date parameters. 

Yes, @impossible is correct. Changing the fiscal year end date doesn't change any data and only the report dates are affected. 

Can you provide a screenshot of the retained earnings that was changed after editing the fiscal year-end dates? Any additional details will be much appreciated.

You can also visit the Government of Canada website to learn more about reporting within your fiscal period. 

Since there are discrepancies on the retained earnings, I'd suggest consulting your accountant. This way, he can help ensure your books are accurate from the previous years. Moving forward, the data will be corrected for the upcoming tax years. 

This will get you in the right direction, @Anonymous. I'll be around to help if you have other reporting concerns. Have a great day!