Newbie in the house =) Would like to ask, is there a safer way to transfer the fund to the online brokerage site like Interactive Broker ( IB ), or I should test it with 100, the subsequently bigger amount? I checked the website but couldnt comprehend firmly, so any sifu here with IB account can shed some light as for fund transfer how it works?

Besides the W- 8BEN form is just for declaration of tax so just confirm can already right? Thanks alot sifu =)