Coinbase provided 1099-Ks to the IRS. If filers didn't also provide an 8949 (cost-basis statement) to demonstrate their net gain/loss, they're likely going to b

Coinbase provided 1099-Ks to the IRS. If filers didn't also provide an 8949 (cost-basis statement) to demonstrate their net gain/loss, they're likely going to be on the hook for taxes on the entire amount reported in the 1099-K.