There are not column headings anymore, that was for 2019 and prior.  For 2020 you need to create or edit your views   Homebase > Add/Edit Custom View...I created on called Addresses and removed the checkboxes next to everything then checked off Client Address and scrolled down to City,State, Zip and Saved it...see screen shots below...that gave me a HB view that shows only the names and addresses including city, state and zip.