How to report 529 plan use for second child

I have two children in college.  We spent down the oldest's 529 plan last year and are using her brother's 529 plan to pay both their tuitions this year.  How do I indicate this on Turbo Tax?  It will only allow me to indicate one child or the other when I answer who the 529 plan funds are being used for when reporting the 1099-Q.

 

Thanks,

Twingrove2