Unexpected Internal Error -30000

I'll be here to help regarding your concern about resolving internal error 30000 in QuickBooks Online (QBO), Beth.

I appreciate your effort in posting to the Community. Let's get this sorted out so you can start using the application seamlessly.

Beforehand, I'd like to know what specific actions you've taken before having this error. That way, we can provide an appropriate resolution to this matter.

In the meantime, let's perform some basic troubleshooting steps to know if it is a browser-related issue. The stored cache can cause certain issues to a cloud-based application such as QuickBooks. To access your account using incognito, follow these shortcuts:

• Google Chrome: press Ctrl + Shift + N
• Mozilla Firefox: press Ctrl + Shift + P
• Safari: press Command + Shift + N

Once done, let's get back to your regular browser and clear its cache and cookies. It fixes issues including unusual behaviors and error codes or messages. You can also use other supported browsers as an alternative.

To gain comprehensive information on your financial reports, you can check out this article for more details: Run reports in QuickBooks Online.

You can always post a reply regarding the error you've mentioned above. The Community is available to lend a hand for help with any QuickBooks matters. Stay safe.

I have already cleared the cache and cookies, and restarted the computer. Still getting the same error.

I am trying to match a deposit to an invoice.

I appreciate you getting back to this thread and providing an update after performing some troubleshooting steps in your QuickBooks Online (QBO) account, Beth.

Since you're experiencing the same issue after performing the steps advised by my colleague above and still getting the same error, I'd recommend contacting our QuickBooks care team. It's the best we can do, given they have all the resources to look into your account via screen-sharing sessions.

Here's how:

1. Log in to your QBO company.
2. Click the Help button at the top right corner.
3. Go to the Search tab, then select Contact us.
4. Provide a summary of your concern, then click Continue.
5. Choose a way to connect with us. You can either choose Chat with us or Have us call you.

Additionally, here's an article you can browse for a seamless process of adding a deposit to an invoice: Add a deposit to an invoice in QuickBooks Online.

I'll always be here in the Community if you require additional assistance managing tasks in your QuickBooks account. Let me know in the comments below so I can further back you up.