Last week the 2018 1040X wasnt working properly, so make sure youve updated.

Then to properly prepare an amended return you need to open and activate the 1040X (click the year box) BEFORE you make any changes.....if a state is involved, activate the state amended form, then go back to the federal form and make the changes needed.

I just tested a sample return amending from Single to HOH and my figures all flowed fine...so I know it works as intended.