Originally Posted by macropod

You will need to do a fair bit of work before your document can be used for the mailmerge. For starters, the tables should not have 'around' wrapping, as they need to be embedded in IF tests that evaluate whether the corresponding fields in your workbook have data, so that the tables can be conditionally displayed. I suggest you consider a two-column page layout or, if you don't want the page arrangement to change when a given table isn't present, a two-column table layout with the mergefields and subject tables in their owwn cells within it.

It's not particularly difficult to do, but your document has tables in it that don't exist in the data source and vice-versa, so I don't know what is supposed to happen in each case.