Do I need an LLC for this?

I am going to be launching an SEO Panel soon (Similar to SMM panels but offering various SEO services)

I have tried applying to multiple payment processors, but they all require a "Business Registration" number.

In my case, would you recommend me to register my business as a US LLC? UK LLC? Or are there any better options?

Would appreciate any advice. Thank you

I would recommend a US LLC.

Incorporate in one of the states that benefits from 0% corporation tax.

The U.k is a tax nightmare.

Probably a Deleware LLC like everyone seems to do