The Receipts (Incoming) tab is used to record receipt of money from a tenant, e.g. a security deposit or rental payment.
Payments (Outgoing) tab is used to record the payment of money to a tenant, e.g. the return of a security deposit.
Incidental expenses or ad hoc fees can easily be applied to the landlord account associated with the property instance.
Circumstances may arise when you wish to apply a credit to the tenant/rental account associated with a property, e.g. the tenant has performed some remedial works on their property. When a credit is applied to a property it will appear in the rent report for that property in the same manner as a tenant payment. Rental credits will not appear as income within the landlord statement. Also, if your letting agency applies management fees on rents collected, then a management fee will be applied as a result of the addition of a rental credit.