You can download your Lifetime report file from KDP by following these steps:

1. Head to https://kdpreports.amazon.com/dashboard

2. Click on "Royalties Estimator"

3. Select "Lifetime" from the date drop-down menu

4. Click the download button and save the file to a place on your computer where you can find it

5. On the AHS homepage, click the "Upload income report" button

6. Select the report file from you computer

7. Please be patient as the file uploads. Large libraries can take a moment to finish.