After you add in the new things to your CB db, go the File Menu and pick the 'Collection Statistics' option. This will sync your basic db stats to your online account.
For newer reports for your collection:
-In ComicBase, pick a report style (ex: Collection Report) under the Reports Menu, pick your report options, and hit the 'Save to Web' to upload it to your online account
*ComicBase Sidekick can do this automatically for you through its 'Save to Cloud' option; take a look at your Sidekick settings (Schedule and Save to Cloud Tabs) to see if its setup for you already; you can tweak how often it uploads a new report and what reports will auto-upload for you.