Anyone have any tricks to combine invoice lines when billing by time and materials? We want time on our service lines to be combined into one line rather than showing each time entry

Does the Invoicing Preferences page get you what you need? The "Combine Time Items On Invoices" option? Company --> Accounting --> Invoicing Preferences. You can also set this on an individual invoice custom form (under the Preferences tab).

it didn't on what i've tried-but i wasn't sure if that was because it was before i had switched the settings. guessing it won't retroactively change an invoice you've created but haven't sent out yet.

I believe these settings only apply to the actual PDF/HTML print out of these. I don't think it changes the way it looks in the NetSuite UI.