will turbo tax input my capital gains data from my Vanguard tax information in 1099-B

You may be able to import IRS form 1099-B information directly from your financial institution.  This TurboTax Help may be helpful.

If you are not able to import directly from your financial institution, you may consider entering summary information from your financial institution.  Create a .PDF of the IRS form 1099-B or IRS form 8949 to upload into TurboTax Online.  Follow these steps.       

1. Down the left side of the screen, click Federal.
2. Down the left side of the screen, click Wages & Income.
3. Click the down arrow to the right of Investments and Savings.
4. Click to the right of Stocks, Cryptocurrency, Mutual Funds, Bonds, Other (1099-B).
5. Click Add investments.
6. On the Let's import your tax info screen, select Enter a different way.
7. On the OK, let's start with one investment type screen, select Stocks, Bonds, Mutual Funds, then Continue.
8. At the screen Which bank or brokerage, enter the information.  Click Continue.
9. Do these sales include any employee stock, enter No.
10. Do you have more than three sales, enter Yes.
11. Do these sales include any other types of investments, enter No.
12. Did you buy every investment listed, enter Yes.  Continue.
13. On the screen Now, choose how to enter your sales, select Sales section totals.  Select Continue.
14. At the screen Look for your sales on your 1099-B, select Continue.
15. You will now be able to enter the total proceeds (sales) and cost basis, along with the sales category. Refer to your IRS form 1099-B, IRS form 8949 and / or Schedule D Capital Gains and Losses for the amounts and category. When finished, select Continue
16. You can add additional sales totals by selecting the Add another sales total on the Review your sales section totals screen.
17. When completed, close the record and click Continue.
18.  At the screen Now, we'll help you upload your 1099-B since the IRS requires a copy, browse and select your document.  Select Continue.
19. When you upload your document, your filing instructions will not show that anything needs to be mailed in, and no IRS form 8453 will be generated.