Sole Proprietor stopped working years ago

Hello.  I actually stopped working a few years ago.  I was a sole proprietor filing a schedule C--no employees. 

I have been completing a schedule C each year in TT with zeros everywhere.  I am definitely retired.

I believe the schedule C has not been going to the IRS since it has been all zeros.

So, do I need to amend a previous Tax return to show my business closed in a previous year?