Visa and tax laws are complicated and errors can result in severe consequences. Research and work with reputable firms that are well-experienced in these areas.

The United States Citizenship and Immigrations Services 

uscis.gov
Responsible for the processes for foreigners to lawfully enter the United States. USCIS regards ANY public performance by an artist or entertainer to be ‘work,’ whether or not the artist is being paid. If you perform, you are considered a ‘temporary worker.’ This includes industry showcases such as SXSW where an artist may incur expenses to get there and perform. And if you are paid, there are tax laws that must be followed too.

Artists from Abroad: Complete guide to U.S. immigration and & tax requirements 

artistsfromabroad.org
Artists from Abroad is the most complete and up-to-date online resource for U.S. immigration and tax requirements foreign guest artists, their managers, and performing arts organizations.