How to add a Customer Selector Field at Line level on from the Invoice Screen

Hi @ViweM  We need to have small customization to do this. Here is the code for reference.

Also. attached screenshot and customization package for reference. You can deploy this package to your instance and verify.

Customization: Line level Customer ID has defaulted to the Header Customer ID, and if required we can the Line level Customer ID

DAC field

 public class ARTranExt : PXCacheExtension<ARTran>
    {
        [PXUIField(DisplayName = "Customer ID")]
        [PXDefault(typeof(ARInvoice.customerID))]
        [CustomerActive]
        public int? UsrCustomerID { get; set; }
        public abstract class usrCustomerID : PX.Data.BQL.BqlInt.Field<usrCustomerID> { }

    }