How to "Save As" a Fillable PDF with Data Entered into the Fields

I hope someone out there is able to help:

I created a PDF form with fillable fields (which is great) but I am unable to save the PDF once fields have any data entered into them.

Is there any way I can send this form to users and they are able to save and print their filled forms as opposed to only being able to print save blank forms?

Thanks in advance.

RH