If you need to find the Channel Manager ID for new rates, just follow the steps below:
1. Go to the 'Mews' page and sign in.
2. Open the 'Marketplace' from the menu on the top-left of your page.
3. Click on 'My subscriptions', find the Katanox integration for your property, and click on 'Edit'.
4. Click on 'Channel manager rates'. This will take you to the page that shows which rate plans are currently configured.
5. Click on the rate you want under 'Channel Manager ID"
6. The Channel manager ID is the one shown on the page and now you only need to copy it to add a new rate.