Suggestions:
No, While doing the payment entry, the system does not populate the sundry code, but users have to enter the same after selecting sundry type .
A Payment Entry is a record indicating that payment has been made for a Purchase receipt.
Payment Entry can be made against the following transactions:
1) Purchase Voucher (Receipt)
2) Purchase Order (Advance Payment adjustment )
3) Expense Claim (Direct Payments)
Payment menu exists in Finance -> Payables -> Payment