"Date acquired" field for 1099-B doesn't take any date, any solutions?

I don't know if this will work, but try entering 'various'.

Thanks for your reply but Neither correct date, various or NA works. 

The 1099-B form is used to report gain or loss from selling stocks, bonds, or other securities. Your gain or loss reported on form 1099-B can be imported directly from your bank or entered manually.  To enter the gain/loss, follow the steps below:

1. Login to Turbo Tax.
2. Under Income and Expenses tab, .
3. Jump to Investment Income, click show more and choose Stocks, Bonds, Mutual Funds, and other 1099-B, then click start.
4. Click yes on "Did you sell Stocks, Bonds, Mutual Funds in 2020?", then click continue.
5. Choose Stocks, Bonds, Mutual Funds" on "what type of investment?", click continue.
6. The next screen, "Let's import your tax information", at the bottom of the screen, click "Change how i enter my form".
7. The next screen, "Let's import it" or "Type it in myself".
8. The screen, "Lets get the info from your 1099B", enter the Payer's information and the amount on the next screen..