On this page you will be able to find useful information about the application process for being assigned an EIN or ITIN number by the U.S. Internal Revenue Service (IRS). All individuals or companies that have income from activities on U.S. soil must, as a rule, report an annual U.S. tax return.
Via the link, they can carry out a test which will give an answer as to whether they should apply and which number (EIN or ITIN). You will also be able to find answers to other questions on this page.
If you use our CPA service, you can apply for these numbers via them, they will help you with the process for a small fee.