How do I know if my amended 1040K was accepted or completed correctly

You should have received two emails from TurboTax after filing that would tell you about the status of your return.  If you didn't receive them then check your spam filter.

 

If you can't find your emails then check your TurboTax efile status here.

 

Then you can check the status of your amended return on the IRS website here.

 

@joannezeus2