I have a client who in 2019 sold items he inherited some through an auction house and some on consignment. Neither the auction house or consignment house issue 1099s or report the sales to the IRS. However, the amount he netted was in excess of $168,000. He has little or no basis. Where and how do I report this on his 2019 tax return.
Thank you ever so much for any help you can offer.