As you said, this was not self-employment but a one off thing so just report the amount as other income,
which is the last line of wages and income in Turbo tax "other reportable income" or you can report it as "Hobby Income" The IRS makes a distinction between what you do as a business--ongoing work for profit, which requires a schedule C vs one off or hobbies. The former can deduct expenses and the latter can't so from an IRS view they "prefer" you report it as one-off.
I did not understand your comment "This pay does not put her into the threshold of needing to file from a dollar amount, but she needs to file because no taxes were withheld."No taxes withheld and below filing requirement, no need to file. The standard deduction is the smaller of earned income plus $400 or $12950. If earned income is $750 or less, the standard deduction is $1150.
Regarding the 1099-T, if the scholarship was used for school then nothing needs to go on the return.
As the parent of the dependent you use the 1099-T to claim educ credits on your return
