Click on Federal on the left side of the screen. Click on Wages & Income at the top of the screen. Enter each W-2 separately. The program will ask you if you have another W-2 to enter after you have entered the first W-2
Where are you stuck? Do you know where to enter them?
Go to Federal>Wages and Income to enter your W-2's. Enter them one at a time. After each one, click Add a W-2 until all of your 2020 W-2's have been entered on the same tax return.