We've been seeing posts similar to yours. The recommended troubleshooting step to be able to e-file and e-pay tax forms is to clear browser's cache. Once done, please go back to the Payroll Tax Center page to e-pay and e-file your tax forms again.
Thank you JaeAnn - I contacted online support and they explained that the State filing was still pending approval (I'm not sure if it is approval for our specific company or for Quickbooks Online to file in my state for any business), however they said that we should get an email in about 4 weeks to confirm if it is active, and that in the mean time just to pay manually.
Nothing on Quickbooks Online explains this, so you really need to contact an agent to find this out, which isn't ideal.
Thanks for following up with the Community, CECS1.
I'm happy to hear JaeAnnC was able to help you find out more information about your registration for e-services.
Since e-services aren't active yet, you can pay taxes manually if necessary.