The specific interest rates are under the menu of Finance Management - Definitions. The Interest Rates to be used in the Specific Interest Calculation and the Transaction Currency and Start Date values for which these Interest Rates will be applied are specified here. This interest rate will apply until a new start date has been specified from the start date for the same transaction currency.
For example: As stated in the following window, the specific interest rate to be applied for the TRY Transaction Currency from 01/01/2018 to 01/08/2018 is 8%. As of 01/08/2018, the Specific Interest Rate is taken as 10%.
The interest rate is accepted as "0" for the fields where no interest rate info is entered.