Thank you so much for your help so far, it has lessened my anxiety for the coming tax season.
I've sold maybe 150 items. I understand strictly speaking I would have to itemize every one, but is it okay just to report each of the 1099k forms? ie. one entry for Mercari, one entry for eBay, one entry for Poshmark.
(And provide itemized accounts of each sale if there's an audit)
