This  is called Recording Sales of Composite Supply under GST (Expenses  Apportioning). 
                 
                Composite supply means a supply is comprising two or  more goods/services, which are naturally bundled and supplied in with each  other in the ordinary course of business, one of which is a principal supply.  The items cannot be supplied separately.  
                   
                Illustration in Revised GST law : Where goods are packed,  and transported with insurance, the supply of goods, packing materials,  transport and insurance is a composite supply. Insurance, transport cannot be  done separately if there are no goods to supply. Thus, the supply of goods is the  principal supply  
                   
                You can record the sales  of a composite supply using a sales invoice. The rate of tax applicable on the  principal supply will be considered as the rate of tax for the composite  supply.  
                   
                Example: 
                   
                Transactions  :    Sold the following Goods to Chitra & Co.  (within state customer) on Credit on 01/04/2020 with Packing Charges of Rs.500,  Delivery Charges with Rs.300 and there is a Discount of Rs.400 on total Sales  value . 
                
                  
                    | Name    of Product | 
                    Qty.  | 
                    Rate  | 
                    Value  | 
                   
                  
                    Desktop    HCL Infinity (GST-18%)  | 
                    1    Nos.  | 
                    30,000  | 
                    30,000  | 
                   
                  
                    Desktop    Lenovo K200 (GST-18%)  | 
                    1    Nos.  | 
                    45,000  | 
                    45,000  | 
                   
                 
                                                                                                                                 
                  To create a ‘Discount on Sale’ / ‘Packing Charges’ & ‘Delivery  Charges’  Ledger: 
                   
                1.  Go to Gateway of Tally > Accounts  Info. > Ledgers > Create. 
                   
                2.  Enter the Name of the ledger ‘Discount on Sale’ 
                   
                3.  Select Indirect Expenses as  the group name in the Under field.   
                   
                4.  Set the option Inventory Values  are affected to No. 
                   
                5.  Set the option Is GST  Applicable? to Not Applicable. 
                 
                  
                   
                6.  Select GST in the Include  in assessable value calculation for: field. 
                   
                   
                   
                  7.  Select Goods in the Appropriated to field. 
                   
                   
                   
                  8.  Select Based on Value in  the Method of Calculation field. 
                   
                   
                   
                     
                   
                  9.  Press Enter to accept  and save the ledger. 
                
                  
                    Note    : 
                      Like    ‘Discount on Sale’ ledger as created above, you can create ‘‘Packing Charges’    & ‘Delivery Charges’  Ledger | 
                   
                 
                10. Example  of GST Sales Invoice having Packaging Charges, Delivery Charges and  Discount on Sale as below… 
               
                   
                 
                
                  
                    Note :     
                      
                        - 
                          
Remember, put the Discount on Sale Value    with minus (-) symbol to deduct the amount form the invoice value. 
                         
                        - 
                          
All these Indirect Expenses can be given    either in % or in Value 
                         
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                You can  view the tax details by clicking Alt+A: Tax Analysis. Click Alt+F1:  Detailed to view the tax break-up. 
                 
                   
                 
                
                  
                    Note :     
                      
                        - Packing Charges, Delivery Charges and    Discount on Sale is calculated Proportionately on the basis of Value of    Goods.
 
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