Hi @sujatha
If you want then you can handle it with help of cart rules. Create a voucher discount for those clients who are willing to make early checkouts.
Otherwise, we can customize this feature in QloApps for you.
If you want to go for that then please raise a ticket at https://webkul.uvdesk.com/en/customer/create-ticket/

Hello @OP
This is your specific requirement which will require system customization. So I request you to raise a ticket so that we can have a one to one discussion.
https://webkul.uvdesk.com/en/customer/create-ticket/