Solved
I left my job at Pizza Hut a little bit after 2018 in March. I then later got a job at Dunkin' Doughnuts near the end of 2018 in December. Do I have to file a W-2 for Pizza Hut too?
Yes, you need to report all your income and enter both forms W-2 on your tax return.
After entering the first W-2, on the summary page, click on Add another W-2 (see attached screenshot).
Enter your E-mail address. We'll send you an e-mail with instructions to reset your password.