Finding a septic tank can be important for maintenance or inspection. Often, the tank location is marked on the property's site plan, typically found with your home's paperwork. If not, looking for any visible inspection ports or your system's clean-out can help guide you. You might also spot greener grass patches indicating its presence. Have you tried looking at any existing site plans or noticed any changes in your yard? It can be a bit of a detective work, but I'm here if you need more tips!