After you file

I originally filed HOH and received my return. Weeks later after I filed an amendment to Single. It was accepted.

 

 The next day after discussion with my son realized I should have kept it HOH. So I want to cancel that amendment. 
I need help canceling that amendment.

Per the instructions I tried to cancel amendment but do not see that option. Only says I need to wait 16 weeks. Pls help me get this amendment canceled ASAP. Thx!