Inserting audio

I am using Windows 10, Audacity 2.3.1. I have a file that I edited in another software. I am trying to learn to use Audacity, and was told today that I accidentally cut out a sentence, and I need to insert that piece of audio in the middle of my recording. I can’t figure out how to do that. I’ve watched 10+ tutorials on YouTube and none teach this. Thanks in advance for your help!

Do you still have that sentence in an audio file, or do you need to re-record it?

do you need to re-record it?

I can think of a worse one. You have to re-record it in your voice and then make it sound like their voice.