Our ACH integration process through Plaid may not support the multifactor authentication that you have set up with your banking institution. If you see a similar message to the one below when connecting your bank account, this indicates that your multifactor is enabled:
To connect your ACH account through Plaid, please temporarily disable the multifactor on your bank account (not on Binance.US) and try again. You're welcome to re-enable your multifactor with your bank after you've completed the authentication process.