Hi, I am currently doing a page that allow user to search for the information they want and display out in the grid view, after which user can export this gridview result to excel. However, I have faced this error saying that only 1 form tag is allowed. Any way to modify the settings of the DotNetNuke so that I could "switch off" the form tag at the skin ? (it displays error at the skin page)

Thank you.

No, there is not.

You will do better using a module that permits you to create the reports that you want.  I suggest looking at the Reports Module and also SGSV from Tressleworks.ca.