Here is how you would do it on a 1040 - Find Business Use of Home (8829) in Deductions  > Select 7 (Schedule E (S Corporation)) in the first drop down, then the specific K-1 in the 2nd drop down, then enter all the information for office in home.  If depreciation, enter in the depreciation area and link it to this 8829.  BUT see #4 at  https://amynorthardcpa.com/deduct-home-office-s-corp/