You can't enter a Form 8937 on Turbo Tax and don't need to - that form is not reported on your tax return.
Form 8937, Report of Organizational Actions Affecting Basis of Securities is only filed by the issuer of a specified security that takes an organizational action that affects the basis of that security. If you received a Form 8937, you will use the information to adjust the basis of the affected security in order to calculate any gain or loss on the sale of that security.
