fanfare
Level 15

Investors & landlords

in order to sell N shares and take a loss on 2021 taxes , you have to STOP BUYING.

But if you already purchased more identical shares before you sold the N shares, and the interval was thirty days or less, your loss deduction is denied in part or in full depending on the number M of identical shares..

selling more shares in a tax deferred account does nothing for you since that is never reported.