How to report investment loss if no 1099-B is issued?

In TurboTax Online Premium, enter an investment by following these steps:

• Click on Federal down the left side of the screen.
• Click on Wages & Income down the left side of the screen.
• Scroll down to Investments and Savings and click the down arrow to the right.
• Click Start / Revisit to the right of Stocks, Cryptocurrency, Mutual Funds, Bonds, Other.
• You may have to click Add investments.
• At the screen Let's import your tax info, click Enter a different way.
• Click on Stock, Bonds, Mutual funds. Click  Continue.
• At the screen Which bank or brokerage is on your 1099-B, enter the information. Click Continue.
• Do these sales include any employee stock, click No.
• Do you have more than three sales on your 1099-B, click No.
• Do these sales include any other types of investments, click No.
• Did you buy every investment listed on your 1099-B, click Yes.  Click Continue.
• At the screen Now, choose how to enter your sales, select One by one.  Click Continue.
• At the screen Look for your sales on your 1099-B, click Continue.
• At the screen Now enter one sales total on this 1099-B, enter information. Click Continue.
• Repeat as necessary by clicking  Add another sales total.  Click Continue.

In TurboTax Online, enter an investment by following these steps:

• Go to Federal / Wages & Income / I'll choose what I work on / Investment Income.
• Click Start / Revisit to the right of Stocks, Cryptocurrency, Mutual Funds, Bonds, Other.
• Click Add investments.