Aha! You are wanting to merge the 2 files together, the one based on the old file and the one based on the new file. You cannot simply use 'Add database to report' to do this, because this assumes 'side-by-side' linking and not 'merge files together'. You need to do separate reports, your existing one and a brand new one that is identical except for being based on the ICW81 table.

Presumably your existing report based on the old ICW65 file is working OK. Now what you need to do is insert the new ICW81 report as a sub-report into the existing ICW65 report. The easiest place to insert is the Report Footer section, so you can get all the old adjustments and then all the new ones.

If you are sorting/grouping the adjustment - say by item number for example - then it gets a bit trickier. You then need to insert the sub-report into the Group Footer (by item number) section, and you also need to set the sub-report link by item number. In the 81A sub-report, you will need to hide most sections, such as the report header/footer and the page header/footer.