How is job status tracked after a bulk submission?

For requests including less than 1,000 forms, the system immediately processes the batch and the response includes the processed forms. For larger batches, you must track the batch processing progress by calling the GET /1099/jobs/{jobId} endpoint.

Submit forms using POST /1099/forms/$bulk-upsert.
Retrieve jobId from the response.
Poll GET /1099/jobs/{jobId} until status: Success.
Retrieve created/updated forms using GET /1099/forms?$filter=createdAt >= {timestamp}.