How to receive a business cleaning license

It is not a good idea to place your question as a answer to someone else's question. You will never get an answer that way.

I have moved your question to its own thread.

But where are you at, In the US, most business license are gotten from the city hall where you live.

Are you sure that you even need a license to clean? I have never known someone that did need a license to clean. But, I suppose that it would depend on the laws where you would be doing the cleaning and whether you were operating out of a store front or not.