How can I deactivate my form to stop submissions on a certain date?

I don't want to delete a form because I may want to reuse it at a later date.  I just want to inactivate it to stop entries by a certain date.  Can do I do that?

Yes, you can certainly do that.

The easiest way is to simply disable your form.

Alternatively, you can also disable form submissions past a certain date if you want it to become automatic and you can always change that later if needed when you are ready to re-allow it.