Electronically submitting 1040X to get Stimulus

I filed my 2020 taxes thru TurboTax and now need to file and amended 1040X. I did not receive stimulus checks when I first filed and believe I am eligible, so I re-answered some questions through TurboTax for the 1040X and it turns out I am eligible for the stimulus.  BUT...the Fed won't accept my 1040X submission because some fields are not matching.  Am I doing something wrong or is the electronic file not providing the correct data?