QB Issue Resolution:

Currently, there isn’t a specific report that will show unbilled time, notes, and individual time sheet. As a workaround, you can open the Income Tracker. This lets you view the unbilled and billed line items and generate a  list with one customer per page. Let me guide you how.

  1. Click Customers on the upper menu.
  2. Select Income Tracker.
  3. Click Time & Expenses to show how unbilled sales items appear.
Once done, click the Action drop-down and choose to Create invoice.
I have this article for your reference if you want to create and print timesheets: Create And Print Timesheets.

Resolution for Issue 'How do I generate a detailed report of unbilled time by customer with each individual time sheet entry listed with the notes rather than grouped into services?' available: Yes (Solved).
Source: Intuit Community forum.

How do I generate a detailed report of unbilled time by customer with each individual time sheet entry listed with the notes rather than grouped into services?: this issue or error code is a known issue in Quickbooks Online (QBO) and/or Quickbooks. Support for this issue is available either by self-service or paid support options. Experts are available to resolve your Quickbooks issue to ensure minimal downtime and continue running your business. First try to resolve the issue yourself by looking for a resolution described below. If it is a complex issue or you are unable to solve the issue, you may contact us by clicking here or by using other support options.

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