how to add NetSuite native items/expenses sublist to custom records in NetSuite (edited)

AI generated answer (using internal Slack threads):

In NetSuite, you can add an editable custom sublist for line items on a custom record by creating a custom child record sublist. This allows you to add and modify line items directly on the form. Here are the steps to do this: 1. Navigate to the custom record type definition page. 2. In the Sublists subtab, click New Sublist. 3. In the Sublist page, select the custom record type you want to associate with the parent record type. 4. In the Sublist Fields subtab, click New Field. 5. In the Label column, enter a name for the field. 6. In the Type column, select the type of field you want to create. 7. In the Source column, select the source of the field data. 8. Click Save. Please note that the sublist will be view-only if it is based on a saved search. To make it editable, you need to ensure that it is not based on a saved search. As for changing the order of Expense and Item sublist on a Bill Credits form, it seems that this is not possible without scripting. The sublist is not exposed on the form for Bill Credits, unlike the Bill form. You might need to write a client script to auto focus the Items subtab when the page loads. ****** Disclaimer: This response was generated by an artificial intelligence assistant based on previous conversations from multiple Slack channels, and may contain inaccuracies or mistakes. ******