About 1099s and inter-entity transactions
You might have generated an AP supplier invoice in one entity and paid it off in another. The AP supplier invoice is included in the 1099 form from the owning entity (the entity that created the transaction).
For example, say you create an AP supplier invoice in Entity 1. Someone pays the AP supplier invoice from Entity 2 on behalf of Entity 1, and Sage Intacct generates an inter-entity transaction between the appropriate accounts. Entity 1 issues the 1099 for the AP supplier invoice.