My shares worth more than £14,000. Shall I get Profit after the deduction or I have to pay tax later myself ?
You would only be taxed on profit made from selling shares. There is currently an an annual exemption of £10,100, so if profit (difference between buying and selling shares) is less than that no tax to pay. If you make more than £10,100 profit, you will need to ask tax office for a Tax Return at end of year (5th April following share sale) with employment and CGT pages. Tell them if it is a one-off.
