A Closeout can only be created in DocketManager if there are no Untracked Revenues within the desired closeout dates. To check for Untracked Revenues prior to creating a Closeout you can navigate to the Accounting tab and then click on the GL Account Breakdown tab. 

The Date Range field to the left will default to the present month and can be altered by clicking on the date range field. Any Untracked Revenues will be listed at the top of the table and the (+) icon will allow you to expand the line to see what order items included Untracked Revenues. 

Once in a while you may be presented with an Untracked Revenue amount but no number to track it back to. This is generally due to an order being posted into your last closeout period. In order to find the untracked item change the Date Range start date to a month or two prior to the month you are searching.

Original Search:

Date Range 12/1/2022 - 12/31/2022

Change to:

Date Range 11/1/2022 - 12/31/2022

One way to prevent this from happening in the future is to turn off the ability of users to Post into Previous Months Closeouts. This can be achieved by going to Settings > Accounting > Financial and toggling Can Post Into Previous Closeout Period to No.