Hi @abiieez, There is a feature in Bahmni called Auto Calulation of Observations to auto calculate but auto populate doesn’t happen with this. With some logic written in custom Groovy file we can automatically add Registration Fee. Pointing you to this to see if you want to try this option.
The second approach that you want to try is setting default fee and making it read only. This is achievable using the Defaults Feature in combination with Concept of Class Computed in Bahmni. Please follow the below steps.