Can’t add my new bank card details to my account

Thanks for posting in the Community, @Carracher electrical.

I'm here to lend a hand.

If you're trying to update your bank account details for your billing subscription, let's try opening your account in a private (incognito) window. Using a safe browser and accessing the program from there can usually fix the issue.

Check out these keyboard shortcuts:

• Command + Shift + N (Safari)
• Ctrl+ Shift + N (Google Chrome)
• Ctrl + Shift + P (Mozilla Firefox) 

Once open, try to update your billing information again. Here's how:

1. Click the Gear icon at the top.
2. Select Billing info.
3. In the Payment Information section, select Edit ✎.
4. Update your payment info.
5. Choose the checkbox to acknowledge the change and confirm your updates.
6. To update your billing address, enter your current address and new address in the next section.
7. Click Update, then Close.

For more details, see this article: Update your billing and subscription info in QuickBooks Self-Employed.

If you subscribed to QuickBooks Self-Employed (QBSE) through Google Play or iTunes and the Apple app store, here's how to update your billing info:

• Google (Android)
• Apple (iOS)

However, if you're trying to connect a bank account, here's a great resource that you can check for a guide: Connect bank and credit card accounts to QuickBooks Self-Employed.

Keep me posted on how things go on your end. I want to ensure this gets resolved for you. Have a great day.