Fill in your EOC with your reply on every line, upload it (.xlsx), and get back — line by line — what the IB/ITL will expect for each clause and how your written reply looks: a readiness signal, the expected documents/tests/drawings, and a suggested fix. You get a colour-coded annotated workbook to download and a copy by email. You can optionally attach up to 5 supporting files (drawings/docs) for the review to look at — anything you don't attach, it can't see — and your files are processed in memory only, never stored.