How can I modify and test my form offline, while it's original state is functioning online?

I'm needing to add financial calculations to my form.  While I'm adding the fields and the calculation formatting, I need the original version online and functioning.  

Hello @MFIRES, I'm afraid that's not possible. Any changes you do on your form via the Form Builder will immediately reflect to your actual form.

If you wish to add financial calculations to your form, just set the field as hidden so it won't show up on your form. That way, you may continue editing your form, and nothing will change on the front-end perspective.