https://help.tallysolutions.com/docs/te9rel60/Tax_India/gst/recording_sales_of_mixed_supply_under_gst.htm

Recording Sales of Mixed Supply Under GST

You can record the sales of a mixed supply using a sales invoice. For this, create a new stock item to account for the bundle of items. The tax of the highest-rated item in the bundle is applicable for this bundled unit.

To record the sales of a mixed supply

1.    Go to Gateway of Tally > Accounting Vouchers > F8: Sales.

2.    Select the applicable tax ledgers (central and state/union territory taxes for local supply, integrated tax for interstate supply).

See also

Recording Sales of Composite Supply Under GST