- Open the form builder of the target form.
- Select the required lookup field.
- Navigate to the Field Properties > Choices section on the right.
- Check the checkbox next to Allow new entries. The Link Name property will appear. It will be set as 'Add New' by default. You can edit it as required.

Note:
- Ticking the Allow new entries checkbox in the form builder will allow the addition of field entries in the lookup field (live mode). You can add an entry only once if the source form allows only one entry per user. Otherwise, you can add multiple entries.
- The entries added here will automatically be populated in the report of the source form.