Hi there, @Sarah543.

Thank you for joining the thread. I appreciate your time and effort in customising your reports to get the information needed. I'm here to guide you on how to add the net and tax amount on the Transaction Lists with Splits report.

From the report's page, go to the small gear icon, then add the check the box beside the Amount and Taxable column. Once done, click on the Run report tab to refresh the page.

I've added these screenshots for your visual references.

If you need additional tips while running and managing your reports in QuickBooks Online, you can check out this link: Run reports in QuickBooks Online.

Just in case you want to save the current customisation of your reports, you preserve that through memorising the report/s. For the detailed instructions, you can check out this article: Memorise reports in QuickBooks Online.

I'm looking forward to hearing from you again. If you have any other QuickBooks questions, please feel free to add a comment below. I'm always here to help. Have a great day!