Client go a Payment wasn't successful message whilst trying to pay invoice

Are you using PayPal, GoCardless, or the new QuickBooks Online (QBO) Payment integration? If you currently have QuickBooks Payments, please first ensure the service is activated by going to the Gear icon > Account and Settings > Payments.

Once activated, open your invoice and click the Manage button at the top right. Under Payments options, verify that Cards and Pay by Bank are toggled on. You may also refer to QuickBooks Payments FAQs for more information and guidance. 

However, if you're utilising a third-party app like PayPal or GoCardless, I recommend contacting our Live Support team. They can help ensure your integration is connected correctly and guide you through any technical hurdles. Please check their support hours to find a convenient time to connect.

Please let me know if you have any other questions or if there's anything else I can assist you with. The Community is always here to help you get back to business.