Thanks for the update, @accounting328.

Since the issue persists that you're still unable to update the WA Workers Compensation rate, I highly recommend contacting our Technical Support Team. They have the tools to check the unforeseen conditions of your company file and perform a screen-share for further isolation.

To contact them, follow the steps provided by my colleague RoseMarjorieA. You can also refer to this article for more information:  Contact the QuickBooks Online Customer Support team.

As always please let me know how this goes or check back if you need help with QBO. Have an awesome day!