Surcharge needs to be applied at POS transaction.
Solution:
First of all Surcharge need to be created with the required rate. Once saved then need to select the surcharge at POS transaction
Steps to add surcharge into a Sale Transaction:
1. Open MC
2. choose Administration > Financial > Surcharge.
3. Create surcharge with required rate.
4. Open POS
5. Click on the Sale Edit button or Press F4.
6. Look for the option Surcharges and click to select the required surcharge.
7. After that, the Add Surcharges button gets enabled.
8. Next, click on Add Surcharges button and select from the existing Surcharges