Filed 2019 but not 2018

I E-Filed my 2019 taxes and I just completed my 2018 taxes. My 2018 taxes I need to mail in but I haven't owned a printer in years. So I can't print them out my tax returns and all the photocopy stores have been closed down due to Corona. With me not having a way to mail in my 2018 taxes stop me from getting my Stimulus Check or will they just go off my 2019 tax returns?