Hey there, RUTHIE45.
I'd be glad to lend a hand to show you how to locate a journal entry by its number.
1. Click the magnifying glass icon in the top right corner.
2. Select Journal Entries from the top drop-down menu.
3. Choose the drop-down menu defaulted to Name and change it to Entry no.
4. Enter the number and select Search.
That will do it. The following link offers additional info on searching for transactions.
Please don't hesitate to reach back out if you have any other questions.