Getting error "Unexpected problem : -30006" when applying a credit to a cutomer invoice. Apparently the credit is finally applied. But it is upsetting. Any ideas?

I can help you sort this out, @Hernando.

Let's first access your account using a private or an incognito browser. This helps us isolate the error for a possible browser-related. You can use any of these keyboard shortcuts:

• Ctrl+ Shift + N for Google Chrome  
• Ctrl + Shift + P for Mozilla Firefox  and Microsoft Edge  
• Command + Shift + N for Safari  

Once logged in, you can try accessing your customer's invoice again. If you can no longer see the error, you may want to clear the cache of your regular browser. Also, you can try using a other supported web browser to further isolate the issue.

If the issue persists, I'd recommend contacting our Customer Care team. A specialist can further look into the error and determine its root cause and resolution. Here's how:

1. Go to Help menu (?).
2. Select Contact Us.
3. Enter your concern, then select Let's talk.
4. Choose a way to connect with us:
   • Start a chat with a support expert.
   • Get a callback from the next available expert.

Just a heads-up, we are open from Monday-Friday 8 AM to 4 PM PST. This ensures our agents can reach out to you as soon as they’re available. You can check to this link anytime if you want to know our support hours and contact us at a time convenient to you: Support hours and types.

You can always drop a comment below if you need more help from us. We're just right here to assist you. 

Same error problem here since early May 2021, tried changing computers, browsers, incognito.    Only seems to be a problem when applying credits to invoices.

Thanks for bringing this up to us, @AirKevin.

We have an investigation where some of our users getting the Unexpected problem: -30006 when applying a payment to an invoice. Our product engineers are aware of this problem and are now working hard to fix this the soonest.

I recommend giving our Customer Care Team a call to add your account details to the list of affected users. This way, you'll be updated as soon as a fix is implemented. Here's how:

1. Click the Help menu in the upper-right hand corner and click Talk to a human.
2. Type in "Talk to a human", then press Enter.
3. Look for I still need a human and click on it.
4. Select Get help from a human.
5. Choose between Chat with us, Schedule an appointment, or Have us call you.

 
Please check out our support hours to ensure that we address your concerns on time.

If you have further questions or concerns, feel free to reach back out anytime. Stay safe.

Same issue - so waiting on a software update to be able to apply a credit? Surely someone has come up with a workaround. Software updates could be years. I need this fixed so I can close my October books today!

Thanks for joining this thread, @TAMurph. I'll give an update regarding the error message you received.

I've checked our reports and found out that the investigation about getting the error "Unexpected problem: -30006" when applying a credit to a customer invoice is currently tagged as closed and resolved. 

In the meantime, we can follow the workaround shared by engineers. You can create an invoice first and then receive payment. This removes the error from occurring. I'll guide you on how:

1. Go to the + New and then select Invoice.
2. Select the name of the customer.
3. Enter the necessary details.
4. Once done, click on Save and close.

Once done, let's receive the payment.

1. From the + New menu, select Receive Payment.
2. Choose the name of the customer.
3. On the Outstanding Transactions, select the invoice.
4. Enter the amount received
5. Click on Save and close.

Aside from that, you can also close the transaction after the error and the payment will be applied.

If you're still experiencing the said issue, I'd recommend contacting our Customer Care team. They can securely pull up your account and further investigate this matter. You can follow the steps shared by my colleague ReymondO on how to reach them.

Once the payment is received, you can now deposit it to your bank. After that, proceed with the reconciliation process. Refer to this guide for the detailed steps: Reconcile an account in QuickBooks Online.

If you have any other concerns or questions, please reach out to me again by tagging my name in your comment. I'll be right here to keep helping, @TAMurph.

Looks like this issue QBO never resolved? Very frustating!

Hello there, droth1.

I hear your sentiments. Know that this isn't the kind of experience we want you to have. 

Our product engineers are now working to fix this. What we can do in the meantime is you can create the invoice first and receive the payment. You may exit from the transaction after the error and the payment is applied.

If the issue persists, I'd suggest checking your browser. You can open a private window. Here's how to access incognito mode in some of the most commonly used web browsers:

•  Google Chrome: Ctrl + Shift + N
• Mozilla Firefox: Ctrl + Shift + P
• Microsoft Edge: Ctrl + Shift + P
• Safari: Command + Option + P

You can refer to this article if the steps were successful: Clear cache and cookies to fix issues when using QuickBooks Online.

You can visit this article to know how to personalize and add specific info to your sales forms: Customize invoices, estimates, and sales receipts in QuickBooks Online.

If you have any further concerns about your transactions, don't hesitate to post them here. Have a great day!

I was getting this error as well.  In my case, my payment date was earlier than the actual banking transaction date in my bank feed.  Once I changed the payment date to be no earlier than the bank transaction date, I no longer saw the error and was able to save the payment.