I need to connect 123 pet with my quickbooks https://online.123petsoftware.com/AppointmentBook

Let me first welcome you here in the Community, userbloemhofr.

I'm here to ensure you're able to connect 123 pet to QuickBooks Online.

You can visit this link: https://quickbooks.intuit.com/za/, to check if 123 pet is supported. If not, I suggest contacting their support team so you'll be able to request an integration.

Also, I encourage checking our Help articles page to learn some tips in managing your QuickBooks account. From there, you can articles that can guide you in completing your future task.

Please get in touch with us if you have additional questions or concerns. We're always here to help you.

@userbloemhofr 

I visited their website but only found limited info. It is possible they only support QBO US version. You may try opening a trial account to make sure.

https://quickbooks.grsm.io/US

https://quickbooks.grsm.io/us-promo

As another option, you may consider using QB Desktop US version to integrate with the app. Deploy a private cloud if required. You may purchase a one time license of QBD 2021 US Pro 1 user worth $299 or QBD 2021 US Premier 1 user worth $499.