How do I add gambling income if a W2G was never received?

Here is how to add your gambling winnings in TurboTax Online:

• Click on Federal Taxes,  Wages & Income,  scroll down to Less Common Income > Gambling Winnings > Start or Revisit
• Answer "Yes" to Did you win money or other prizes in 2024?
• Next you'll be asked Whose W-2G do you want to work on? Since you have no W-2G, answer We didn't receive a W-2G and continue.
• Now the screen Let's check for winnings not reported on a W-2G appears and you can enter your winnings.

Here is some more information you may find helpful: How to Pay Taxes on Gambling Winnings and Losses