Please let me know how to add sub child table to child table in ERPNext.
This is not possible in the way you have thought. You have to create separate tables.
There is no option to create a table inside a table.
Otherwise, you can use tree doctypes.
Thanks @NCP ,
tree doctypes means Is Tree option mean?
What’s your use case?
In odoo I have created child table in main table
In child table when I click Add a line is GoTo another sub child.
Is the flow that’s what I asked how to do in ERP Next.