Hey there, @DawnD12. 

I appreciate you coming to the Community with your question about the Application with Revoked Certificate error. 

I recommend performing all the troubleshooting steps listed in the guide below to help resolve your issue: 

How to fix the error QuickBooks - Application with Revoked Certificate

If none of those steps work, I suggest getting in touch with our Customer Support Team because this problem is a known issue at this time. You can review the status of the problem here: Status updates. 

I hope this helps. Don't hesitate to come back if you have any other questions. Bye for now!