Login to your NetBank
Select your Trust Account. This will bring you to a screen showing all of the transactions.
Above the "Search" box and the "Advanced search" button, click on the month you would like to export transactions for
At the bottom of the screen, click "Export"
Select OFX as the file format
Click "Export transactions"
If your computer prompts you to "Save" or "Open", click "Save"
Below is a screenshot showing the process.