You may need to provide a bit more detail (and maybe a screenshot) to help everyone understand the exact issue. You shouldn't have to exclude anything that didn't match in an inner join because the join itself will exclude them. The join step display still shows what values didn't match to help you see the results, but the next step should display only matching values.
But maybe you mean that you want to fix the mis-matched values so they do match. There might be various approaches based on your data and that's where some detail would help.