You can easily customize inline citations directly in SmartCite. To do so, select the inline citation you want to edit from the document. This will pull up the citation in the SmartCite box, which you can then select the Gear icon or right-click to pull up a menu panel. Select "edit in-line citation"
You can then choose how to customize the citation.
When you are done editing hit Done > Update Citation and SmartCite will insert the new details.
If you have any questions, get in touch!