Mapping Disappearing before I ve finished

Thanks for flagging this — you've found a genuine bug in the trial balance import. The mapping review wasn't being saved anywhere until you clicked "Use this mapping", so reloading the page or navigating away partway through lost the whole review and forced a full re-upload.

This has now been fixed. Your mapping review is saved automatically as you go, so if you reload or navigate away before finishing, returning to the import step will bring your review back exactly where you left it — no re-upload needed.

Sorry for the repeated re-uploads this caused, and thanks for reporting it.