coinbase pro and coinbase prime customers receive a 1099-K if they pass the 200 transaction/$20k threshold. once you pass the threshold, they will place a restriction on your account and formally require you to complete a taxpayer ID request.

this is why i don't really trade on coinbase pro---i mainly only use them to cash out fiat money. staying under the 200 transaction threshold prevents any 1099 reporting. i do my day trading elsewhere, on exchanges that don't report to the IRS.

be mindful of this: a handful of states have much lower 1099 reporting thresholds, some as low as $600.

regular coinbase.com customers do not receive a 1099-K. they may receive a 1099-MISC if they receive $600 or more from "coinbase earn, staking rewards, and USDC rewards".