Hey there, @lisa-2i-t-com. 

It's great to see you back in the Community! 

Let me ask you some additional questions so we can narrow down the cause: 

• Have you been able to successfully edit other projects in the system? If so, what details are different in each of the projects? 
• Have you tried signing out and then back in? 

This will help us determine the cause of this issue and get you on your way with your projects in QBO. I'll be waiting for your response! 

Yes, I have tried signing out/ back in.

It looks like its mainly if I want to delete a date that was previously there. 

Hey again, @lisa-2i-t-com. 

Thanks for coming back and giving some additional information. 

After researching, this isn't an on-going issue at this time for QuickBooks Online. However, let's try doing the actions below before contacting the Customer Support Team: 

• Use an incognito window or private browser
• Use another device or computer 

In the end, if these actions don't work, reach out to our Customer Support Team for further assistance. 

Please keep us updated on how these actions goes and if you end up getting in touch with support. I'm only a post away if you need me again!