It won't always match because there are over a dozen items that might not be on your W-2, including unreported disability or sick pay, scholarship or fellowship income, taxable tips, and dependent care or adoption benefits, just to name a few.
If you're using the CD/download TurboTax software, you can see exactly what's included in Line 1 by switching to Forms mode, opening your Form 1040, right-clicking the amount on Line 1 and choosing Data Source, and then selecting the Wages, Salaries & Tips Worksheet.
To view a PDF copy of the Wages, Salaries & Tips Worksheet in TurboTax Online:
- Open your return if it's not already open.
- Select Tax Tools > Print Center near the bottom of the left navigational menu (expand the 3 white lines to open the menu, if necessary).
- Select Print, save, or preview this year's return.
- Select 2018 federal returns and then select either Include government worksheets (optional) or Include government and TurboTax worksheets (optional) and follow the instructions to preview the PDF file. The worksheet will be in your PDF file.