User is encountering an error message: Please choose item to add when performing Cash Sale and Invoice CSV Import Update if the transaction lines being updated include a non-item transaction line such as Tax Line, Shipping Line and Cost of Sales Line.
Solution
Open CSV file
Remove Tax Line, Shipping Line, and Cost of Sales Line
Note: If the CSV File is created through a Transaction Saved Search, you may add the following Criteria to exclude the non-item transaction lines:
Tax Line = is false
Shipping Line = is false