To claim business use of your home, you have to fill out form 8829, which separates direct and indirect expenses, and lists several different categories of expense. the details asked for on 8829 is all you will need unless you are audited, in which case you will have to back up the expenses claimed with the usual business records.Iu2019m not entirely sure what you mean by u2018itemizingu2023 expenses. If you meant to ask whether you could claim business use of the home without itemizing deductions, the answer is definitely yes. Theyu2019re entirely different forms.