Manual tax lines in Inbound 810 ECEINI

How do we import the tax lines when using EDI? When we added a manual tax line in the input file, the Payables Open interface program rejects the invoice with the reason -

Insufficient Tax Tax Classification Code or Tax       nformation Rate Code is mandatory for manual tax lines

In the input file definition, I can see option to enter the tax code  -

3010    30   15   361  TAX_CODE 

Do we need to input a code in this field? Usually when we enter invoices manually, the Tax classification code gets populated for all items added to invoice and we then use the system to automatically calculate the tax. How do we replicate this when using EDI?