Starting a Business in Pennsylvania?

I am starting a Photography Business in Pennsylvania... I of course want to make 110% sure I do everything correctly in every aspect. Can anyone help me with what needs to be done in my state to start your own business. I have been reading up on this matter for months and it seems so many sites, forums, blogs... show more I am starting a Photography Business in Pennsylvania...

I of course want to make 110% sure I do everything correctly in every aspect. Can anyone help me with what needs to be done in my state to start your own business. I have been reading up on this matter for months and it seems so many sites, forums, blogs and even books say a lot of the same thing however they say some different things as well.

I have already obtained my EIN number.

Any help would be great thank you.
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