The ISS - Service Tax field is calculated by the system when a bill receivable is added, according to the following priority:

• The system checks whether the class registered allows ISS calculation through the Calculate ISS? field.
• In the Customer file, check whether the customer collects the ISS through the Collect ISS? field or not.

If Yes is entered, the system does not calculate it (because the customer collects the ISS).

If No is entered, the system calculates it according to MV_ALIQISS parameter settings.

The following parameters are used:

• • MV_MUNIC

Indicates the ISS supplier. The system generates a new bill payable for the city government defined in this parameter, when the bill receivable is added.

• • MV_DIAISS

Due date for payment of the bill.

Application:

Suppose you define a 5% rate in the MV_ALIQISS parameter by entering 5, registering a class that calculates the ISS and a customer that does not collect the ISS. If you add a R$ 1,000.00 bill receivable for this customer using this class, notice that the ISS field is automatically filled out with a R$ 50.00 amount.