Originally Posted by dave4him:
Are we able to write off house expenses, property tax, interest???
Yes. You can deduct the business portion (time-space%) of your property tax, mortgage interest, utilities, house insurance, house repairs, and house depreciation. You cannot deduct a portion of your monthly mortgage payment - the principal payment is covered when you claim house depreciation. If you rent your home you can deduct the business portion of your rent.
All of these expenses appear on IRS Form 8829 Expenses for Business Use of Your Home.