Cannot efile amended federal return. State return not filed yet.

I e-filed my 2023 federal return and it was accepted.  I have not e-filed my AL state return yet in TurboTax.  I realized I made an error on one of my W-2s and created the federal amendment in TurboTax, but TurboTax will not let me e-file the federal amendment.  It says I have to mail the federal amendment because a state return is involved.  Is this how it is supposed to work?