When I connect to ProAdvisor after signing in to Quickbooks Online, I get error: "We're sorry, we can't find the page..." How do I find it and begin training?

Hello there. Let me share the information that may have been caused when connecting to your ProAdvisor account in QuickBooks Online (QBO). 

We just need to ensure that we log in to view the ProAdvisor portal. By doing this, we can make sure we use the correct portal. 

However, if the login link and credentials are correct but the issue continues, I'd recommend logging your account in a private window. The private window doesn't store any history or form data, unlike the regular browser, which tends to hold onto information. 

We can use either of these shortcut keys:

• Mozilla Firefox: press Ctrl + Shift + P
• Internet Explorer: press Ctrl + Shift + P
• Safari: press Command + Shift +N

If it works fine from there, switch back to your regular browser and clear its cache. If the issue persists, try using other supported browsers to narrow down the cause.

On the other hand, if the issue persists after following the steps above, I recommend contacting our support team. This way, they'll be notified of the issue you've encountered and also have the appropriate tools that will best fit your needs. 

Here's how: 

1. Sign in to your QuickBooks Online company.
2. Select Help (?).
3. Select Contact Us and choose a way to connect with us:

•   Start a chat with a support expert.
•   Get a callback from the next available expert.

You can contact us from Mondays to Fridays, 8:00 AM to 10:00 PM, and Saturdays to Sundays, 8:00 AM to 6:00 PM. 

In addition, I've added this article for your reference and learn about Accountant Profile and QuickBooks Accountant guidelines: Learn about Accountant profile and Find a QuickBooks Accountant guidelines.

Please don't hesitate to reply to this thread if you need additional assistance in connecting ProAdvisor to QuickBooks Online. I'll keep an eye out for it. Stay safe.