Yes, you can apply the retainer of a parent project to the invoices of its phases and sub-phases. Check the Core Help for more on retainers. You can also use the client retainer on various projects of that client.
Yes, you can apply the retainer of a parent project to the invoices of its phases and sub-phases. Check the Core Help for more on retainers. You can also use the client retainer on various projects of that client.