Did you ever figure this out? I am no expert, but since I recently did this, I might understand what you're trying to do...and I don't feel like the other answers you got were relevant. If I'm understanding you correctly, you are trying to set up QBO Payroll to automatically deduct and pay the state of OREGON the OR FMLA tax that is new as of January 1st, 2023, and you may have already started the process, but realized you needed to correct the percentages you entered originally.

This may already be what you are doing, and maybe you have different options than me, but here is how I can edit my OR FMLA tax percentage rates:

1. go into "Payroll Settings" via the gear in the upper right hand corner

2. click on the pencil to edit "Oregon tax" 

3. scroll down to the "Oregon Paid Family and Medical Leave Tax (PFML)" section

4. since I've already set up a "policy" (I only have one), it is there under "policy groups" and on the right there is an option to edit this. Mine is currently set to 0% Employer and 60% Employee, which is what I think you are trying to do.

I have no idea if this is helpful, but I know how frustrating it is when you can't find someone to ask, and I'm in Oregon so have the same taxes!