The educator expense deduction is for teachers of K-12 grades. Head Start is a pre-K early childhood program for younger children.
Go to Federal>Deductions and Credits>Employment Expenses>Teacher (Educator) Expenses
https://www.irs.gov/taxtopics/tc458
https://ttlc.intuit.com/turbotax-support/en-us/help-article/tax-credits-deductions/educator-expense-deduction/L4ez9qGKu_US_en_US?uid=m5zq4nk2