how to source the customer on a item line level on the vendor bill from a custom project filed on the header

AI generated answer (using internal Slack threads):

****** Disclaimer: This response was generated by an artificial intelligence assistant based on previous conversations from multiple Slack channels, and may contain inaccuracies or mistakes. ****** To source the customer on an item line level on the vendor bill from a custom project field on the header, you would need to use a SuiteScript. Unfortunately, workflows cannot manipulate the expenses sublist, and only the item sublist can be used in workflows. Here's a general idea of how you might approach this: 1. Create a User Event script that triggers on the 'beforeSubmit' event of the Vendor Bill record. 2. In the script, get the value of the custom project field from the header. 3. Loop through each line item in the 'item' sublist. 4. For each line item, set the value of the customer field to the value obtained from the header. Please note that this is a general approach and you might need to adjust it according to your specific requirements and the actual field IDs in your NetSuite account. Also, remember to thoroughly test your script in a sandbox environment before deploying it to production. Unfortunately, I cannot provide a specific code sample as none were provided in the threads/conversations.