Custom Field to Display the Parent Customer Credit Limit in the Child Customer's Transactions

1. Navigate to Customization > Lists, Records, & Fields > Transaction Body Fields > New.
2. Enter a name in the Label field.
3. Set the Type to Currency.
4. Uncheck the Store Value field.
5. Mark the Sale check box on the Applies To tab.
6. Click the Display tab.
7. Select the tab in which the field should be added on transaction form in the Subtab field.
8. Click Validation & Defaulting tab.
9. Set the Default Value field to {entity.parentcustomer.creditlimit}.
10. Save.