Hi! I have more than one w2 form to file. How do I do this on the turbo tax app?

After you enter the first W-2, it should ask if you need to enter another one. 

Just enter the first one and once you have done you will get to a summary window with a blue button that says "Add W-2".

Click on it and enter the second W-2

NOB. I am using turbotax Premier. I hope it is the same for any other version.