Where should I declare my freelance income?

I am an employee, but also a Sole Proprietor. I am an artist. My business is not officially registered yet, but I have been trading for some time now. Do I need to declare the income I earned through freelance work in the same ITR12 that contains the information I received from the IRP5 from my employer, or would I need to declare the freelance income in some other form?

You would declare the freelance work and expenses under the Business Income section of the tax return (ITR12) where you would put your income and expenses.