Can I convert my old/basic form into a SMART PDF form?

I have existing jotforms and I would like to convert it into smart pdf so that i wont be reodoing all the conditions.

Please note that SMART PDF Forms are created using Fillable PDF or PDF Forms. It is not possible to convert existing web forms into SMART PDF form, if you have a fillable PDF version of your form then you can import it, here is the guide for more details: How-can-i-import-my-own-pdf-with-smart-pdf-forms

As for cloning conditional logic, you cannot import or copy conditional logic into another form because the labels in the form field are not the same for each form. The only way to clone all the conditions is to clone the form or create them manually.