Thank you for bringing this to our attention, user0408. Allow me to further clarify the process of adding billable time entries to your paid invoices.

You can add time entries to an invoice regardless of its status, provided that the time entry is linked to the appropriate customer/project and has been marked as billable.

Since you've confirmed that you followed the steps provided by my colleague above, the reason they are not showing in the Suggested transactions is a possible browser issue. Browsers use cache to speed up the loading of web pages, but over time, it accumulates and leads to unusual behavior of the program.

To fix this, log in to your QBO account using an incognito or private browser window. This will enable you to work with a clean slate. Please use these keyboard shortcuts:

• Google Chrome: Ctrl + Shift + N
• Mozilla Firefox: Ctrl + Shift + P
• Microsoft Edge: Ctrl + Shift + N
• Safari: Command + Shift + N

Then, add the billable time charges again. If it's successful, clear your browser's cache to remove specific issues and help the program run efficiently. Also, you can use other devices and supported browsers to ensure everything works as expected. 

Additionally, you can create and send customer statements to remind them of their upcoming deadlines.

Please return to this thread if you need further assistance with adding your billable time entries to your paid invoices, user0408. We're here to guide you through the steps.