drivers – How to install scanner brother dcp-7030 on ubuntu

When I try to follow the instructions here:

I get this error when I run this command in 3:
dpkg -i –force-all brscan3-0.2.13-1.amd64.deb

error: required read/write access to the dpkg database directory /var/lib/dpkg

How do i resolve this issue? This is fresh install of ubuntu, 20.04 I think. I have no idea what this means and I am a linux newbie. All I need is a button on desktop to scan a document from the scanner, which is Brother dcp-7030