After you file

I am confused the other people on this chain said that it was possible.

The IRS website clearly shows that amended 2019 returns onward can be filed electronically using the tax software that was previously used to file the return.

IRS website Electronic Filing Now Available for Form 1040-X

You can now file Form 1040-X electronically with tax filing software to amend 2019 or 2020 Forms 1040 and 1040-SR. To do so, you must have e-filed your original 2019 or 2020 return

The ability to file the Form 1040-X electronically has been an important long-term goal of the IRS e-file initiative for many years," said Sunita Lough, IRS Deputy Commissioner for Services and Enforcement. "Given the details needed on the form, there have been numerous challenges to add this form to the e-file family. Our IT and business operation teams worked hard with the nation's tax industry to make this change possible. This is another success for IRS modernization efforts. The addition helps taxpayers have a quicker, easier way to file amended returns, and it streamlines work for the IRS and the entire tax community."

Is there any other tax software for individuals that allows you to file the amendment electronically?