Adding line in banking transactions

Hi there, @Debbie Nev.

Sometimes local internet cache files stored in the system can cause unexpected behavior in the product. This can be the reason why you're unable to add lines when splitting bank transactions. 

To isolate the issue, let's perform some basic troubleshooting steps. You can start opening your QuickBooks account from a private window. This doesn't save your local password and websites. Simply press these shortcut keys to open this mode:
 

• Ctrl + Shift + N (Google Chrome).
• Ctrl + Shift + P (Firefox).
• Control + Option + P (Safari).

Once done, split the downloaded banking transaction again and check if you're able to add another line. 

If yes, clear the cache on your regular browser. If the issue persists, use another supported browser instead. The problem might steam from the browser itself. 

You can also check out this article for further help in categorizing downloaded banking transactions in QuickBooks: How to Review Downloaded Bank and Credit Card Transactions and Put them in the Correct Accounts.

Please don't hesitate to reach back out if you have further questions or concerns, Debbie Nev. Take care and have a wonderful week!