Hi there,

I can see how this would be a useful feature to help with comparing trial balances of different time periods. There is no date of when or if it will be available within Quickbooks Online, but I recommend letting the developers know you'd be interested in having this report by leaving feedback. This can be done by clicking on the Gear icon, then Feedback. Comments left in this section are taken into consideration when designing new features for QuickBooks Online.

If you have any other questions, feel free to reach out here.