How do I add another T4 onto my tax return? Turbotax downloaded one but not the other.

If you are using TurboTax Online, you can search for the T4 slip on the Tax Home page. 

 

If you are using TurboTax Desktop in EasyStep mode, select Income & Expense>T-Slips from the left side menu. Then you can check off any T-slips you need and then continue through the pages for what you selected.   

 

If you are using TurboTax Desktop in Forms mode, you can search for the T4 slip by clicking on the Forms icon in the blue icon bar.