You can update the details of an uploaded document up until you publish or pay it.
Here's how:
Navigate to the 'Documents' section of the 'Bookkeeping' tab.
In the 'Inbox' section, select the document you want to update.
You'll be directed to the document details page. On the right side of the screen, you can update the necessary details.
Once you've finished making changes, click on 'Save Changes'.
If you notice that the bill contains incorrect details but you have already published it to Xero or QuickBooks, you will need to make changes directly in your accounting software.