Custom fields are not passed to the Tax connector when a credit memo is generated.
While configuring a Tax App, you may encounter issues where a custom field on Subscription object is not passed to the Tax connector when a credit memo is generated.
To resolve this, you might want to refer the notes below:
When a standalone credit memo is created, it will not pass the subscription's custom fields because a standalone Credit Memo is associated with ProductRatePlanCharge.
Charges on Subscription are always RatePlanCharges.
A credit memo generated from an invoice should be able to pass the custom fields on the subscription level.
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