Ok,
I am a web designer, I am planning my new business and will be offering services world wide and I will be marketing in the United States and probably the United Kingdom, my question is what type of taxes will I need to pay, will I only need to be concerned about / researching the IRS.gov website or will I need to look into other countries revenue systems as well? I am based out of Arizona.
I know this may be an easy question, I believe I only need to worry about the IRS as I am based out of the United States however I don`t want to skimp on an important step such as business taxes so would like to know for sure.
Thanks for the help



