Hi,

1. In your CS or Core module, create a server action call 'CreateTaxInvoice' or whatever name you see fits.

2. In that server action, 

3. Of course, this is the most basic, as usually will be doing quite a few checks and validation before calling the server action

Hi

write the logic to submit button

In Save Server Action :

1.First Call CreateOrUpdate Invoice Details CRUD Operation with Below  Properties

2. Than assign Invoice Details Id To Sorce Variable 

3 Again  Call CreateOrUpdateTaxInvoice CRUD Operation with Below  Properties 

Note: you want to create a dropdown so Create a other entities or table (Either Static or Dynamic )

Thanks

Md Mansur

Hi Marhta ,
there is two way of doing this 
1. you can use local variable to temporarily hold the value you desired to store and then drag the CreateOrUpdate Entity action then map all the local variable accordingly. and hit the save Screen Action on the UI .
2. or you can just use an aggregate on the screen to fetch the data from the database and select the entity in which you want to store the information and then map the UI input fields with the aggregates variable and then use the same entity action to store the information to the database.