Deductions & credits

Printer ink is a Supply Expense

.In turbo tax it says: 

Supply expenses are incidental items that cost $200 or less or last less than a year.

Examples include:
- Pens, pencils, paper, pads
- Printer ink, toner, copier paper
- Data CDs, floppy disks
- Stamps, labels, envelopes, mailers
- Flash drives

More examples:
- Shipping materials
- Storage and filing boxes
- Memo and message pads, Post-it notepads
- Whiteboards and markers
- Cleaning supplies
- Calendars and planners
- Staples, staplers, paper clips, scissors
- Tape, tape dispensers, rulers
- Calculators