I filed an amended return last year and I don't see it on my turbo tax? It was on there and now it's gone since 2020 taxes have come up. So what did turbo tax do with it?

It should be there.  Log into your turbo tax account. Once you are logged in, go to the bottom of the page where it says Your tax returns & documents. Select 2020>download/print return (PDF).

Check through the pdf to see if you have form 1040X in your list of forms.  If so this is your amended return that is in the pdf. Data from this return will carryover into your 2021 return.

Thank you! I will definitely try your information! When it says it will go into 2021 tax information what does that mean?  I read it at the bottom of your comment.

So I went on and looked. It is not there. What should I do now? I have it saved in my documents. The IRS received it. It's just insane it's not showing. Why?

Did you use Turbo Tax Online to file 2020?  And to do the amended return?  Or did you use the Desktop program?  If you used Online to amend then the amended return replaces the original return.  So it should be there unless you are in the wrong account, that's common.  

What Dave meant was if you are in the same exact account when you start 2021 it will transfer from the amended return and not the original 2020 return.  

My apologies. I looked deeper and found what I was looking for, I had to actually ask for it. It was under the prompts you suggested. So thank you so much!