Shares of stock

I hold an amount of shares of a stock for more than 20 years, and recently sold part of the shares. I do not have record of the orginal price that I bought in those shares. How can I calculate capital gain and loss of the stock that I owned previously? How can I fill in the capital gain and loss form (SA108)?

Hi,

You can ask us to check the details for you. You can see information here:

Post transaction valuation checks for Capital Gains (CG34)

Thank you.