I want see the details of a journal entry. i need to see the reason i wrote.

Viewing journal entry is so easy, tbotens.

You can run the Journal report to know all the details of the entry. To do this, please follow the steps below:

1. Click Reports on the left menu.
2. On the search bar, type Journal, then search.
3. Under the Report period, select the correct date

You'll want to customize reports to focus on what you want to highlight on your business. Please check this article for your future reference: Customize Reports In QuickBooks Online.

Keep in touch if there's anything else you need. We're here to help you.