As long as you have Admin privileges you can edit and delete Trust activity but keep in mind, there is not a way to bring them back.
- Click Clients in your blue menu bar
- Click on the desired client
- Go to their Trust Account tab to the right
- Click on the desired lined item you wish to Edit (if it's not shown, pull down the Project option to choose General Project Trust + All Project Trusts to pull any transaction)
- Click the Delete button
- Click the Ok button