How to correct Expense Report in IE after importing it to AP

Hallo experts,

Here is the situation...

I have created an expense report based on Credit Card transactions. Got approved and audited successfully.

Then imported to AP. I then want to correct the expense report how should I go about it?

Cancelling the AP invoice doesn't help.

Please let me know step by step process.

Appreciate your help.

Thanks.

Anil