If you have sold tickets you can't change the price of your tickets, instead, you will need to close them and add a new ticket at another price.

If you haven't yet sold any tickets select which event you would like to amend the ticket price for on the dashboard. Click manage tickets and view tickets on the left-hand side.

Using the Cog icon, click edit.

Scroll down to the price box and enter the new price. Click Update ticket.