Capital Gains

I had Long term capital gain in 2019 as stated in the online entries.  But, my TurboTax filed return indicated that no Schedule D was required.  My long term Capital gain was entered as an entry to the tax return.  Then, how did TurboTax know the Capital Gain is Long Term and did my Tax calculate my tax for 2019?  I do hope TurboTax did not treat the long term capital gain as ordinary income in my 2019 tax return.