The home office expenses need to be deducted similarly to the way you are deducting expenses via schedule C. Line item as a negative number on capital gain worksheet.
If you rent ... this is a particularly big deduction and not one of it should overlook. If you do not rent .. you are still able to deduct internet/water/power/building expenses/etc.
Turbo tax is not set up for traders. I use the CD version. Not sure if there is a difference But I have figured all this out on how to fiddle with the program to reflect all the deductions properly.
let me know if you have questions.
