## Documentation Index Access the complete documentation index at: https://www.zoho.com/ke/books/kb/llms.txt Use this file to discover all available documentation pages before proceeding. [Back](./) # Why can’t I add certain timesheets to my Invoice? Ensure if the timesheet is associated with a **Fixed Cost Project**. If it is, such timesheets are considered **Non-billable** and cannot be individually included in an invoice. Instead, a single line item representing the entire project, along with its fixed cost, will be added to the invoice. As a workaround, you can enter a note in the **Notes** section of each timesheet indicating that the time log has been invoiced. These details can be exported from the **Timesheet Details** report. * * *