Invoice Level Tax and importing invoices from a csv file

Invoice Level Tax and importing invoices from a csv file

Hi

I am trying to import existing invoices from a csv file into Zoho Books and get this error for the entries in "Invoice Level Tax":
   Value in the field does not match with the data type supported by us.

What data type is supported for this field?

(I have tried entries like "GST" (an existing tax name), "tax", "taxable").

Thanks in advance!