I am looking for some help and guidance on caulking a flat seem. We just put up new trim and baseboards and the caulking between the 90 degree joints is going well, but we have seams where the trim meets door jams and archway board that I am struggling with. They are flat to semi flat seems but the caulk keeps leaving an edge where I don't want one I have tried cutting the tip a few different ways. Does anyone have a tips or a guide to help with this? I framed to seems in question in red boxes.

Thanks!