Your child's earned income
Unlike other taxpayers, the IRS treats your dependent child differently depending on whether they earn money from work or through investments. Dependent children who have earned income of more than $13,850 of income in 2023 typically need to file a personal income tax return and might owe tax. This threshold increases to $14,600 for 2024. Earned income applies to wages and salaries your child receives as a result of providing services to an employer or from self-employment, even if only through a part-time job.
However, even if your child earns less than this threshold, it may be a good idea to file a tax return for them. They could be eligible for a tax refund if they had income tax withheld form their paycheck. Regardless of the amount of income your dependent child earns, their standard deduction is typically different than yours. It is limited by the larger of $1,250 in 2023 ($1,300 in 2024) or their earned income plus $400, with the maximum equal to the standard deduction for single taxpayers which is $13,850 for 2023 and $14,600 for 2024.
https://turbotax.intuit.com/tax-tips/family/tax-filing-requirements-for-children/L8ice6z0K
$13850 bascially is 2023 standard deduction for single file, which is the maximum of dependent child deduction. Child (at least my child) does not have unearned money such as bank interest and divident.
