How are withdrawals from brokerage accounts taxed and how do I report them in TT? Many thanks.

I had no employment income in 2019 and instead paid my expenses from a brokerage account, withdrawing a total of 100K.  How are these taxed? What info about them do I need to include on my return? Do I need to report any information other than what's included on the 1099 forms I've received?  Many thanks.