I have filed my taxes and now need to file for my Mom. I purchased new TurboTax but wont' let me download. How do I file another return without causing issues?

I have filed my taxes using turbo tax and I need to file for my Mom.  I purchased a new turbo tax and when I download it says I have to delete mine before I can download.  How do I file a return for someone else without causing issues with my current return?