You didn't mention which version of Timeslips, but I just tested in a copy of v2020 and you can filter the slip listing for that field.  The report will not give you a subtotal for the value of the Do Not Bill portion, though it will show the value in each slip. You would need to export to Excel to get a subtotal.. 

Nancy Duhon, Esq.
Duhon Technology Solutions, LLC
Master Certified Consultant for Sage Timeslips
Providing individual Consultations and Third Party Remote Desktop Support - including older/unsupported versions.
404-325-9779
[email protected]

You didn't mention which version of Timeslips, but I just tested in a copy of v2020 and you can filter the slip listing for that field.  The report will not give you a subtotal for the value of the Do Not Bill portion, though it will show the value in each slip. You would need to export to Excel to get a subtotal.. 

Nancy Duhon, Esq.
Duhon Technology Solutions, LLC
Master Certified Consultant for Sage Timeslips
Providing individual Consultations and Third Party Remote Desktop Support - including older/unsupported versions.
404-325-9779
[email protected]

I am running Timeslips Premium.

Thanks, since that is later than v2020, the advice should work.

Where do I find the Slip Detail Report?

From the topmost menus, Reports, then:

Nancy Duhon, Esq.
Duhon Technology Solutions, LLC
Master Certified Consultant for Sage Timeslips
Providing individual Consultations and Third Party Remote Desktop Support - including older/unsupported versions.
404-325-9779
[email protected]