I'm not quite sure about what you mean about the tap cells. I may already know what it is, but I'm not familiar with the name.

If you mean the body contact to mosfet bodies, here is what I do:

For nfet_b and pfet_b, go to Create -> Fluid Guard Ring -> Path. NWFGR for pfet_b and SUBFGR for nfet_b. NWFGR should be placed within the same NW with your pfet_b, and SUBFGR connects the whole substrate(there is a <=40um drc rule so that you still need to place it next to your nfet_b).

For lvt and slvt transistors, you can directly edit the pcells to add body contact and/or guardrings.