You can modify your listing by accessing “My Account”, “Sales” and then select the listing you wish to modify.

Remember, once a buyer buys tickets from that listing you will longer be able to modify the listing.

If any or all of tickets remain unsold, the modifications will take effect upon these tickets. As such, changes will not be reflected in any of the tickets that have already been sold.

You have several modification options:
Modify the amount to receive. You can modify this number as many times as you want.
Modify the location. Remember it is important to check the event map from StubHub, to ensure you enter the correct location.
Modify the number of tickets
Upload e-tickets
Delete listing