I don't think PayPal has ever been an option for Online versions. Maybe you can use PayPal to buy the desktop program. But it would still need to have a US billing address. Since this FAQ doesn't specifically say PayPal I would think you can't use it.
https://ttlc.intuit.com/community/payments/help/how-can-i-pay-for-my-turbotax-online-fees/00/27388
Maybe you used a credit card with a US address before like a relative's credit card.
