Hi all, thank you for your feedback. Here's some updates on this: 
If your taxpayer a new client of yours and is having trouble signing in, have them open their invite email from link@intuit.com and right-click the "Accept" button to open in a new browser tab. This has been an approved workaround for now.

For existing clients, contact support to verify your client is signing into the correct account.

Some troubleshooting steps your taxpayer can to take before you contact support:

• Clear cache and cookies/ browsing history
• Sign in using an incognito browser
• Are they getting a "Nothing to do here" message? Have them click the Sign Out link on the upper right and sign in again to show the request. 
• Delete your client from Intuit Link client view and create a new request to re-invite them. 
  
  

   

(In some cases, your taxpayer may need to contact support for a back-end password reset, your expert will let you know if that's the case.)
Let me know if any of these solutions worked for you. 
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