Hi, @stanislovewhite .
Shopify Payments in the US requires a social security number (SSN). If you do not have one, I would encourage you to take a look at other available payment providers in the US that may not require an SSN. You simply need to search for United States on that page and the list of gateways will appear.
I did a quick search and can confirm that Stripe will allow an EIN instead of SSN. Stripe is a popular option and would certainly be worth looking into.
I hope this helps. Please let me know if you have any other questions.
All the best,