My husband and I invested $20,000 in shares in a non public company that closed. How do I enter that to show as a capital loss?

How do we split that as a capital loss and how is it specifically entered in turbo tax 2018? and what form??

Getting started

To claim capital losses, complete line 127 and Schedule 3 of your return.  Here's a link for more information on which small business corporations shares qualify: 

And another link on Losses and How to Claim Them on Your Taxes: