Injured Spouse

I realized after I had filed our 2019 taxes that I also needed to file the Injured Spouse form 8379. I thought I followed the directions here on Turbo tax correctly by filing an amended return and filling out the questions regarding injured spouse as instructed, however, I never actually printed the form 8379 nor did I mail it in with my amended return because that was not explicitly part of the instructions. My question is do I need to mail that in separately or was that part of what I filled in and printed off here on Turbotax?