Small Business Deduction - where to I put a $100 printer?

I've got a long list of office related expenses - but, I often unsure where or how to categorize everything when entering into TurboTax.  Maybe it doesn't matter that much?  I don't really know.   For, starters, I seem to be having trouble categorizing a printer, a few cables for monitors, a computer mouse - and similar.   I'm looking at the Business tab in Turbotax in the Business Income and Expenses area - where you enter your expenses for deduction.   Maybe the printer should be in the assets area?  I bought a couple of monitors  for work - I guess those go into the asset area.