Click on Forms at the top navigational bar.
From the tree on the left select the name of your form to expand the directories.
Click on Manage
A sub-navigational bar will appear under the top navigational-bar on the top. Click on Activate icon on the sub-navigational-bar.
The Activation Date Survey Start Date is already set to the current date. You can give the Expiration Date Survey Close Date for the form. If date is not entered, the form expires on the date your survey package expires.
Check the Remove Responses If the form was active in the past and had gathered some responses. You can Delete those responses by clicking on this option. checkbox to delete old response data. (For example, Test Data, or data from previous survey)
Click OK to activate the form.

* Forms can be Published after activation.