It depends. Please keep in mind that there are some limitations on the simplified deduction for Home Offices.
The most common limitation is the gross income limitation. Please see questions 15, 16 & 17 in the link below;
**Mark the post that answers your question by clicking on "Mark as Best Answer"
I am having the same issue. How is Turbo Tax calculating the home office deduction if it is using the simplified method for home office deduction? I am well within the gross income limitation, but I am getting a different number from what Turbo Tax has computed. With a square footage of 110 x$5= 550, but I am getting $367. Any ideas? Even Form 8829, I am still getting a different number.
This new method uses a prescribed rate multiplied by the allowable square footage used in the home. For 2020, the prescribed rate is $5 per square foot with a maximum of 300 square feet. If the office measures 150 square feet, for example, then the deduction would be $750 (150 x $5).
I suggest deleting the deduction and re-entering after clearing cookies, history etc.