The home office deduction lets you deduct certain expenses if you use part of your home regularly and exclusively for business. This space could be a room or a clearly defined area used only for work.
You can calculate the deduction using the simplified method (a flat rate per square foot) or the regular method (a percentage of actual home expenses like rent, utilities, and insurance). This deduction can help lower your taxable income if you run a business or are self-employed and genuinely work from home.
For more information click in this link: IRS.gov