You might have had the project set to Hourly at first so when changing it to Flat Fee it will not revert all past entries to non-billable. Follow the steps below to make your entries non-billable
- Click on Invoicing from your blue menu bar
- Choose the desired invoic.
- Make sure that the invoice is not yet finalized (If you see the Unfinalize button, click on it)
- Click on a work entry that is showing billable
- Uncheck the box next to Billable
- Click the Save & Close button
Repeat Steps 4-6 for each lined entry except for the one that applies the flat fee. By the time you're done, the invoice balance should just be the flat fee.