New features not accessible on old Manager.io

I have been using Manager.io for a few years now. I have found that some of the new features that are available on a new business that I have just created are not available on my older business.

For example, the South African Tax Reports functionalities are not available on my older business. I also need to know how to set a new business start date for my old business. I would like to move my business start date forward because I know a lot more about Manager and my accountant has extracted my old data and prepared all the necessary Financial Statements. I need to start afresh with my bookkeeping in order reflect an accurate balance sheet.

Just start a new business and enter the opening balances

There is no Start Date anymore - it was got rid of years ago

Thank you but I made a mistake. Actually, both my old and new businesses are on Manager Cloud. I do not use manager.io for several years now.