Yes, you should use C and D in transactions such as receipts, payments, and journals, as it is mandatory to input them. This determination is based on the nature of the accounts used in the transaction, and it operates in the Double Entry System, which records transactions affecting two or more accounts. For every transaction, there are at least two accounts involved: one account is debited, and another account is credited. Follow these three golden rules when performing such transactions:
1. Debit what comes in, Credit what goes out.
2. Debit all expenses and losses, Credit all incomes and gains.
3. Debit the receiver, Credit the giver.