Hello, @Carvin625. ‎

Let me help you accept the invitation so you can log in to your QuickBooks Online account.

Since, you're unable to accept your invitation, we can perform the basic browser troubleshooting process. This way we can run the browser better and faster. Cookies and caches might block you from accessing your invitation link.

Here's how:
 

1. Restart your browser.
2. Log in to your account and try open the invite in an incognito or private browser. You can use these keyboard shortcuts to launch a new private window:
   
   Google Chrome: press Ctrl + Shift + N 
   Mozilla Firefox: press Ctrl + Shift + P
   Safari: press Command + Shift + N
    

If it works on the private browser, you can go back to the regular browser and clear your browser's cache. From there, log back in and access the invite. But, if you're still unable to connect into the account, we can recover your user ID and/or reset its password.

You can also contact our support team if the issue continues. This way, you can do a screen sharing with the agent securely and help you with the process to resolve the issue.

Here's how:
 

1. Sign in to your QuickBooks Online company.
2. Go to Help.
3. Select Contact Us.
4. Enter your concern, then select Let's talk.
5. Choose a way to connect with us:

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

I've also added this article to learn how to accept the invitation: How to Add Clients to QuickBooks Online Accountant, this article explains the things to do when you're invited to access the account.
 

I'm always around if you have further clarification or additional information in accessing the invite. Take care always!