From your Ticket Tailor dashboard, head to Events, then select your event and choose Edit event and tickets from the left-hand menu.
Scroll down to the Tickets and items heading, and tick the checkbox marked Allow customers to make a donation under the Donations section.
You can then set a Donation title, Donation description, and an optional Suggested donation amount.
💡 For more detailed information, please visit this help article: How to accept donations for your event.