Form 1099-B with no cost basis for ESPP shares - How do I account for LT Gain and Ordinary Income

I have a 1099-B for ESPP shares I sold. All it shows is the number of shares, date sold, and proceeds. ComputerShare provided additional information showing the acquisition date, shares, reportable proceeds, cost basis, gain, gain type (all are long term), ordinary income, and Noncovered. How do I enter this into Turbo Tax Premier 2019 and what supporting documentation do I need to provide to the IRS assuming I must submit form 8949?

Thanks