If you've previously used RehearsalMix on Planning Center you'll need to agree to transition to the new RehearsalMix. This will result in wiping your account of your previous content. At any point you can download that content by logging in to RehearsalMix.com and downloading a .zip of your previously purchased content.
Click ‘connect’ next to Planning Center.
If you have access to multiple organizations on Planning Center make sure to choose the correct organization. You can only link your Planning Center account if you’re an Organization Administrator.
Click ‘Allow’ to authorize access to your Planning Center account from within MultiTracks.com.
Once the accounts are successfully connected, you’ll see a message that shows you’re connected to your Planning Center Organization on your connected accounts page.