My customer cant pay her invoice by card Every time she tries it puts her back to the start

Hi intuit_823de10e85f7 , welcome to the QuickBooks Community! Thanks for reaching out!

There are a few things to check here. The first step are for you to verify, and some are for your customer to try.

For you:

1. Make sure card payments are enabled. Go to Settings ⚙ > Account and Settings > Sales > Online delivery and make sure "Online invoice" is selected with credit cards turned on. If this is off, your customer won't be able to pay by card at all.

For your customer:

2. Try copying the payment link directly. Instead of clicking "Pay Now" in the email, right-click the "Review and Pay" button, copy the link, and paste it straight into the browser address bar.

3. Try a different browser. Chrome, Firefox, or Edge can make a difference.

4. Double-check card details. Make sure the billing address matches exactly what the bank has on file, with no special characters in any of the fields.

Can you let us know if your customer see any error message, or does it just silently loop back? And is this happening on every invoice or just this one? That'll help us narrow it down further! Looking forward to your response.