Import tax information through invoiceso interface

Hi,

We have a vendor invoice import process  using open invoice interface, that works fine, but it only import invoice lines without tax. Now I am trying to import tax information, so user won't need to manually add tax code and hit 'Calculate Tax' to add tax lines in invoice work  bench.

Now my first question is, can I just populate tax columns, such as 'Tax_Code', etc., in the invoice lines for the items, without adding new rows of tax for each item line? If so, which columns are required? I tried to add Tax_Code to the items, but I got errors 'The account created with overlay is invalid' and 'Invalid distribution account'.