1099 Question

We are running into a number of vendors that are 1099 reportable but for whatever reason do not have an income tax type on the distribution lines of some invoices.  Is there an easy way to correct these? 

I see that there is a utility that can be run to update income tax details but it will update all lines for a vendor to the default type for that vendor.  This will create other issues for us as we have many vendors where some invoices are reportable and others are not or where a single vendor may have multiple income tax types.