No, you'll be ok as long as that rma number is on there which sounds like you did. The printout label just makes it easier and quicker for them to get you in the system,checked thru and testing. They will have to do more by hand so the turn around won't be as quick. You can always call them to let them know and request a note to be put in your account about it.

Vash1306
So I got to the step to ship my card to EVGA. I missed the attachment that states to attach the "shipping" label with the barcode. But I wrote the address as the email says with my return address and the RMA number on the address. Will this cause my card to get lost once it arrives to EVGA? Frustrated that the email did mention the attached label.

Hi Vash1306,
 
You should be good.  As long as the product in the box is the actual one authorized for return and the RMA# outside of the package, the team should be able to process it in swiftly.  
 
Have a great rest of your weekend!