I've had this exact issue since 4/16/2024. It's been escalated several times. I'm extremely frustrated as they cannot resolve it. Like you, I had an issue like this a year or so ago.
Intuit claims that my Stand Alone Payroll Core Account (which they put me in when they discontinued Intuit Online Payroll) is being blocked from connecting to my QBO Advanced Account because the QBO Advanced Account "thinks" it is already connected and equipped with the built-in payroll service that is optional in QBO Advanced. However, we are not nor have we ever used the built-in service. We did quickly take out a trial of the built-in service about a year ago and cancelled it a few days later as it didn't serve our needs. Moreover, whatever that trial left behind had certainly not been blocking successful exports until mid-April 2024!
The rep I spoke to noted that Intuit changed to a new type of billing system in April (called Obill, IIRC) and that it is this system that has flagged our QBO accounts as being unacceptable for import of Stand Alone QB Payroll Data. From what I gather, this billing system is trying to protect us from having two payroll services linked to QBO. While I get that, it is ludicrous that Intuit cannot connect two of its own products properly, especially after doing so for 10+ years. It's also not very satisfying to learn that a this resulted from a change they made in their internal accounting system.
They suggested I move to the internal QBO-embedded payroll. Not only will that cause me to have my 2010 to 2023 data in the old system and 2024 to ? data in a new system, but the embedded system is more expensive and missing features. They also suggested buying a QBO import plugin from a third party, but the one they suggested is cumbersome and an additional $25/mo.
I'm sorry I don't have a solution, but you're not alone. When I talk next to my rep on my case number, I'll send a link to this thread.
Finally, the post below seems to be our issue:
https://quickbooks.intuit.com/learn-support/en-us/help-article/accounting-bookkeeping/export-payroll...
Good luck. Sadly, I've grown to like QB Payroll's features, but not if it can't talk to QBO properly. If I have to begin again with a different account for QB Payroll to connect to QBO (a hassle), I probably will use it as an opportunity to move my payroll to another vendor. The other vendor will at least advocate for QBO compatibility.
