Good morning @mart,

Just to see if I understood correctly, you would like to filter to a specific reservation when using the accounting report to search for an amount.

As of this moment, Mews does not support that feature. However, there is a workaround that you can do.

You can export the file that you have filtered in the System and sort the amount from there. In this article it describes how you can export the file, in detail: Track your revenue with the Accounting report export (mews.com)

Hope that helps, let me know if you have any more questions.

Have a wonderful day!