Yes, you need to contact HMRC that you have a business.
If you have been operating for a long time and did not reported, there could be a fine depending on your income.

I have not been able to get a job and its going to be almost 1 year. Before I look into other options, I want to hear advice of other people. Maybe there is something that I am doing wrong. I am not even able to qualify for the interview because companies are not willing to take those on the Tier 1 ...