Hi EmHead82
Thanks for your post. Please allow me to extend you a very warm welcome to the Community Forum. I hope you find it a useful tool.
In this matter, for a third-party app, there would be no additional charge from MYOB. However, you would need to contact the third-party app if you will be charged after integrating the third-party app with MYOB.
Please don't hesitate to post again if you need help in the future.
If my response has answered your enquiry please click "Accept as Solution" to assist other users find this information.
Cheers,
Leneth