If you need to remove an expense from your account, archiving it will do the trick!
This function is only available to administrators, power receptionists, and bookkeepers.
Archive an expense
Find the expense you wish to archive by heading to the Expenses tab, and then selecting the the appropriate one from the list:
Hit the Archive expense button:
You'll be prompted to confirm that you wish to archive it:
Click OK, and that expense will be gone.
If the expense you're archiving is related to a stock adjustment on a product, that adjustment will not be changed. You will need to manually readjust the stock, if necessary.
If you don't wish to remove it entirely, you can edit an expense, as well!