Sundry Creditors and sundry debtors?

Can anyone help me in finding or making —> sundry creditors and sundry debtors field… so that i can make an transaction that i have received the payment from a particular customer…
I want to mark the payment received from a particular customer and manager should automatically distribute the payment to the invoices.

Why do you actually need these ?
Have you activated the Customer/Sale Invoice/Supplier/Purchase Invoice tabs
If you use Receive Money and the account Customer Credits + Supplier, Manager will automatically distribute the payment to the invoices.

Also read the various Guides
https://forum.manager.io/t/table-of-contents/5796

Thanks Brucanna