Depreciation and self-employment tax.

1.  Depreciation and Schedule C

see schedule C https://www.irs.gov/pub/irs-pdf/f1040sc.pdf

Your gross income appears in line 7. Your total expense includes in line 28, which includes depreciation in line 13.  

Assuming your house depreciation basis is 275000, annual deduction is 10000 over 27.5 years.  Your appliance home furniture is depreciated over 5 years, let's say another 5,000.  see https://www.irs.gov/publications/p946

2.  Self-employment tax and Schedule C

https://www.irs.gov/pub/irs-pdf/f1040sse.pdf

see line 2 "Net profit or (loss) from schedule C , line 31"

You have to pay 12.4% self-emplyment tax (same as payroll tax if you are employed) on line 10.