I have 2 returns to returns to submit. I filled the 1st one and received my return. My 2nd one came late and I haven’t filled it yet. Do I tap Refile from my 1st return?

I tried submitting both tax returns separately but I get an error message. And when I try to get my Netfile code from the cra website I’m unable to view my assessments. So should I tap refile on turbo tax from my original return?