Capital Gains from private stock sale, no 1099B

received lump sum of a private stock sale in 2021 from a stock investment made in 1988. I received no 1099-B as the company accountant stated as "no tax documents are needed when there is a sale/purchase of privately held stock"

 

I received the income in the from of a bank transfer to my personal bank account.

 

I don't know the process of how to capture this income on my TurboTax, Self Employed software / tax return?