There are two areas in which you can update or replace your credit card information on impact.com:
In the left navigation menu, select [Menu] → Finance.
Then select Settings → Payment method.
Select Credit Card as the Payment Method, then select Replace in the bottom left.
Input your new card details and select Save.
In the left navigation menu, select [Menu] → Finance → Deposits.
In the top right corner select Make deposit.
Select Credit Card as your Payment Type.
Next to the Card Number field, select Replace card.
You should be redirected to the Payment method screen where you can select Replace at the bottom left.
Input your new card details and select Save.