Provided both cost basis and adjusted cost basis are not zero, check first if this is what is shown as a covered transaction, it is being reported to the IRS as such. So if this is a covered transaction you must initially enter the reported basis as shown so as not to contradict the issuer and have the IRS send you a letter requesting information. You can then adjust to what the actual basis is in the follow-up question "I need to adjust the cost basis".
If this is not a covered transaction, simply enter the actual cost basis where called for and fill in the rest of the screen where applicable.
The next page will show the following:
After all entries and corrections are made, be sure to check the summary to make sure the gain or loss displays accurately
@billnorthraleigh