The Addicks are unbeaten in their last five outings and secured a battling 1-0 victory at Birmingham last weekend.
"We're feeling good about ourselves," midfielder Jackson said.
"People have spoken about the lack of goals but we feel that is coming, and if we win 1-0 every week we'll take that anyway.
"We certainly feel we're in a decent place and when you've got that solid defence and that stability it gives you something to build on.
"We always feel like if we get a goal we can defend a lead, not that we only want to get one every week. We want to keep going and get more and I think we will.
"Leeds are playing well but so are we so it should be a tough game. We beat them at home last year and, the place that we're in, we'll be thinking it's a winnable game for us."