Both. You can just click +Add Another Row and enter the information. First, log into your TurboTax account and then follow these steps:
· Click on Federal Taxes
· Click I’ll Choose What I Work On
· Click Update next to Wages and Salaries
· Click Edit next to the W-2 you would like to update
· Scroll down to boxes 18-20 and click +Add Another Row to enter the information.