Nick here from Shopify. Good question!
Do you have an EIN number at all? You would need either an EIN or an SSN number in this instance to be able to set up Shopify Payments.
If you have an EIN number, this can be reviewed for you if you want to see about using Shopify Payments. This would need to be sent to our taxation team for that review.
Alternatively, you can use a third-party payment gateway if you prefer. Because your business address is registered to the USA, I would advise using a gateway associated with the USA which you can find here.
I hope that helps and gives you some direction on the next steps. Let me know what you'd like to do and we can take it from there!