Hey there,
I have a cleaning business in Missouri. It is sole-proprietorship and I did not file taxes together with my personal tax (I also work full time beside my business). How can I go about filing that additional business tax?
Additional detail is that business made less than $400 after expenses. Still have to amend?
I have received my refund already.
Incoming search terms for the article:
- can i file my personal taxes and amend with a schedule C later

You need to file an amended return showing the net income on Schedule C-unless the business made no money. The form is a 1040X.