I started an EJ Donor Advised Fund in 2025. I donated from my brokerage account stocks I'd held for over an year. The EJ Charitable giving form tells me stock name, symbol, date and value. HOWEVER, no where can I find my cost basis or average trade price to answer the rest of turbo tax questions. I went onto my brokerage account and can't see this information either. Can I simply leave cost basis blank? How the heck do I figure out what the cost basis was on something that was purchased within the brokerage account a couple of years ago and held in there long term.
