For entering it, ProSeries should have the provision for this, and it would carry over to the required forms. If it does not work for you, let us know if you are using ProSeries Basic or Professional.

I googled:

heerf student support grant taxable

https://www.irs.gov/newsroom/emergency-aid-granted-to-students-due-to-covid-is-not-taxable

https://www.irs.gov/newsroom/higher-education-emergency-grants-frequently-asked-questions

and:

https://www2.ed.gov/about/offices/list/ope/arpfaq.pdf

15. Question: Are emergency financial aid grants to students under the HEERF program
    considered taxable income?
    Answer: No. Emergency financial aid grants made by a federal agency, State, Indian
    tribe, higher education institution or scholarship-granting organization (including a tribal
    organization) to a student because of an event related to the COVID-19 national
    emergency are not included in the student's gross income. For more information, please
    see the Internal Revenue Service (IRS) bulletin Emergency aid granted to students due to
    COVID is not taxable (March 30, 2021).