I work as a salaried employee but have a home office. I'm in the section called Work-Space-in the Home Expenses, should I enter under GST Taxable?

[TurboTaxJennifer]

If you are a GST/HST registrant (you collect and remit GST/HST) enter these expenses in the GST section. If not, you can enter your home office employment expenses in the Zero/Exempt column.