My Child 12 years old made over 1,500 in their custodial brokerage account. Can I addd this with my taxes or do they need to file their own taxes?

Yes, you can include them on your taxes, and no they do not have to file a separate tax return.

This is called the Kiddie Tax and the IRS has two situations that cover this.  

The second applies to you.

1. "If your child's interest, dividends, and other unearned income total more than $2,600, it may be subject to a specific tax on the unearned income of certain children. See the Instructions for Form 8615, Tax for Certain Children Who Have Unearned Income for more information.
2. If your child's only income is interest and dividend income (including capital gain distributions) and totals less than $14.600 for 2024, you may be able to elect to include that income on your return rather than file a return for your child. See Form 8814, Parents' Election To Report Child's Interest and Dividends.

You will have to prepare an IRS form 8814.

Select Tax Tools

• This is on the left sidebar
• You may have to minimize the Federal and State options
• You also may have to scroll down on that menu

1. Once you can work on Tax Tools
2. On the drop-down select Tools
3. There will be 3 green boxes
4. Select Topics Search
5. Type the form number or a topic.
6. 8814
7. Continue through the questions.

Tax Filing Requirements for Children - TurboTax - Intu