It is possible to import  Sub Total Lines  in Invoices / Estimates using Excel Transactions.


How to import Sub Total Lines ?


Kindly map one of your file column to "Show Sub Total" field and fill with values like "TRUE" , "T" , "YES" or "Y". 


The particular row which has "Show Sub Total"  should have the information like below image 



 It will be reflected in QuickBooks as below