If it's a SAAS, I would use a merchant of record payment provider such as paddle. https://www.paddle.com/blog/what-is-merchant-of-record https://www.paddle.com

If it's a SAAS, I would use a merchant of record payment provider such as paddle. https://www.paddle.com/blog/what-is-merchant-of-record https://www.paddle.com/blog/what-is-merchant-of-record They handle all the compliance for you in different countries.