Adjacent text box

Is it possible to create a text box (i.e. of our customer details which runs adjacent to the existing form?)

Hi,

I am not quite sure I know what you are trying to do.  If you are trying to have your form in multiple columns, here is our guide on how to allow for multiple fields on the same line:

http://www.jotform.com/help/90-Field-Positioning

If you are trying to do something else, let us know a bit more detail about what you are trying to do and we will be happy to assist you further.  If you could include an example or screenshot that was also be rather helpful.