What do I do about my schedule C when I retire?

[Christelak]

I'm 72 years old but still work a bit so I do have income from my business. How should I handle that?

[Leonard · Accepted solution]

There is no requirement to notify the IRS that you are stopping your sole proprietorship. 

You can simply stop including a Schedule C with your Form 1040 when the business becomes inactive and is without income or expenses for an entire tax year.