I am a small business owner and a majority of my expenses are "cost of goods sold" but there's no expense category provided by TurboTax.
To enter Cost of goods sold use the Inventory section
https://ttlc.intuit.com/turbotax-support/en-us/help-article/business-tax-credits-deductions/need-report-inventory/L3JwjUlQm_US_en_US