Does the integration handle retentions?

Yes, the Procore & MYOB Integration supports pushing retentions from Procore Progress Claims to MYOB. Firstly, the Default MYOB Account Codes must be set in order for retentions to push across. These can be found by going to Settings -> Defaults:

The Retention Payable Codes refer to the retentions for Commitment Progress Claims, where the Retention Receivable Codes refer to Head Contract Progress Claims. We can enable retention for Commitments by going to the Commitment Tab and enabling Sync Retention:

To enable it for Head Contract Progress Claims, go to the Head Contract Tab and enable Sync Retention:

This will then sync across retentions using the codes set in the Defaults section