So wanted to follow up with a good service experience. I decided to give customer service chat a try for this problem before implementing my own workaround. I connected around 9:35am, got a service agent within a minute and was done by 10:15. She understood and was able to correct the problem - at least as best as I can tell at this point in time, I'll know for sure when I run our next payroll on the 16th. I verified with her multiple times that she updated not just the employee-employer ratio to 72.76% vs 0% (which I can see on my WA state tax info page) but also the multiplier from 0.4% to 0.8% (which I can't see).
She did ask me if I had a notice from the state regarding the 1/1/23 rate change, but I explained this change was for all businesses in WA state and provided her a link to the WA FMLA employer info page so she could see the rates for herself and she was fine making the changes.
This was definitely the best customer service experience I've had with QB in the 10+ years I've been relying on it. Hopefully I'll still feel that way after my next payroll run when I check our new PFML premium withholding
