Thanks for letting me know about this, lsx3.
I can provide some insights about editing the Worker Compensation Code date in QuickBooks Desktop.
The program allows you to modify the Workers Comp Code settings once, which is why the start date can no longer be changed to 5/7/18. It's only the name and description you're able to alter multiple times.
Check out this article for further details:
Set up and edit Workers' Compensation
To make new changes to the date and code, please contact us. One of our specialists can securely access your account and modify the date for you.
You'll want to reach us through this link: http://payroll.intuit.com/support/contact/ and select your Payroll Subscription Type.
Don't hesitate to update me as to how things go. I'm still be here if you need anything else.
