can you not do a csv import to update item fulfilments?

@Terry I have a similar requirement with my company and you cannot import item fulfillments by Netsuite CSV import functionality but you can do it using Integrator.io which I am using for my company data migration.

@Terry depending on what you are trying to update on the import, we do this from a custom record and a script. So from csv import we import something like IF and Tracking # for certain shipments. The script on the custom record triggers on insert and updates the IF with the tracking number.