After you file

I filed married jointly, but skipped the part where I was supposed to add my husbands w2. I thought that he also had to file and indicate he was married filing jointly. I didn’t realize it all went on one form. We had married filing separately the year before so I thought it was the same idea, each person fills out a form. When I went through turbo tax to amend it, I suddenly owed thousands, more than what I had received as a refund. My husband couldn’t receive a refund, clearly, because he went to file and it was rejected, because I had already filed and been accepted as married filing jointly. I can’t possibly be the first person to make this stupid mistake, I hope?