Below are a few tips from searching but, suggest doing your own homework or better yet, seek Professional Advice as the Community is made up volunteers who are small business owners who use Square's Apps and Hardware. Some things to consider - your business will need a US Address, US Bank Account and an EIN or Employer Identification Number which is issued by the IRS. Your EIN will also be used for U.S. tax reporting and filing requirements, hiring employees (if applicable), and sales tax licenses/permits. There are additional things to consider depending on where you plan to sell - you will find some more details here.
