Can't save form fillable PDF in Chrome

I have a fillable PDF form that i have openened in Chrome and filled out the fields. The editing works fine, and I have completed all of the fields. This is an info tracking form and I will need to continue to edit the fields in the future. 

Now, I can PRINT to PDF and get a document that I can read, but when I do that, the new PDF is not editable.  

If I hit CTRL+S save, Chrome will save the doc under the same name. However, if I open this in a new Chrome Browser window, I do not see my edits, I see only the original unedited form. 

How can I save the form, and be able to close the browser without losing all of my changes?

Right now, if I close the browser, I will lose everything. Like I said, I can print a version with the changes in it, but the PDF is no longer editable. 

I need to be able to save it, close it, open it again in the future with all the changes saved, and continue to edit. 

thanks in advance--