How do I apply my 2nd tax form cuz I had 2 jobs

Click on Federal>Wages & Income.  Edit the W-2 and then click on Add another W-2.

Did you already file the first W2?  You have to report ALL your income on the same tax return.  If you haven't filed yet.......

To add a  W2 just type w2 (small W)  in the search box at the top of your return and click on Jump To the W2

OR  To Add a W2 enter it under

Federal Taxes on the left side

Wages & Income  

Then Wages and Salaries- Click the Start or Update button

If you already submitted the first one you will need to file an amended 1040X return to add or change it.   You should not amend until the first return has fully processed and you get the first refund or your tax due payment has cleared.  

How to Amend this year

https://ttlc.intuit.com/turbotax-support/en-us/help-article/tax-return/amend-federal-tax-return-current-year/L7eS6o1qh_US_en_US