Investors & landlords

This was not a stock sale; It was a cash liquidation distribution and was reported on a 1099-DIV.  I still own the stock and there maybe another cash  distribution in 2021.  The distribution was more than I paid for the original stock (12 years ago) so I have a long term capital gain but can't figure out how to report this in Turbo.  The 1099-DIV cash distribution needs to be reduced by the amount I paid for the stock.  Where do I report the deduction?