@allens2what do you mean "how do I add a negative charge to another one?" Another what? Expense Report?

One thing to keep in mind when dealing with refunds is that hopefully the original charges have not been submitted yet so you can add the original charge and refund to the same report.

If that isn't the case, you can still add the refunds (negative amount charges) to an expense report, you just need to be sure that there are enough positive card charges on the same report that add up to at least $1 more than the refunds. The reason is you cannot submit a negative or zero amount expense report.

Also, treat a refund card charge as you would any other card charge.