Can I set up online payment links to allow customers to pay by credit card from all around the world?

Hello, gaye. I can provide about allowing international payments in QuickBooks Self-Employed (QBSE).

The option to set up online payment links to allow international payments in QBSE is unavailable. QuickBooks Payments strongly recommends that all transactions be processed with U.S Banks that also have a U.S-based address.

I'm adding this article for more details on handling invoices in QBSE: Create invoices in QuickBooks Self-Employed.

Additionally, you can check out this article for future reference in categorizing transactions you download from your bank or enter into QuickBooks: Categorize transactions in QuickBooks Self-Employed.

Please stay in touch for any clarifications in managing payments in QuickBooks, I'm always around. 

@gaye-abdourahmane 

You can use third party payment processors and unfortunately none of them support QBSE.