After you complete the 8615 in the child's tax return using the parents info, then it will ask you about other children:
"Do the parents have other children who file a Form 8615?"
As long as you say yes, it will pop up another information form for another child's Form 8615 information filed/to be filed with their return.
The other children's information is entered starting at "information about other children". As long as you continue to answer yes, it will continue to bring up another worksheet to enter another child's Form 8615 information.
More than likely, you will have to first complete the parent's return, then one of the children's return including their Form 8615. Then prepare another child's Form 8615 in their return and include the information from the first child's F8615. Then go back to the first one and enter the information from the second child's 8615 into their return.
Form 8615 is used in the child's return when the child is filing their own return but being taxed at the parent's tax rate, so you also need the parent's information in the return
For additional information, refer to the following:
IRS Instructions for Form 8615
