I had one of my back teeth removed Tue. The dentist said he perforated my sinuses. I've been tasting something salty around or n the incision...

Normal. salty is a new one but people will describe the taste differently. Now if he/she used a saline solution to irrigate the area (I always do) you may be tasting that. The wound/site will also have a taste as well. If the sinus perf was small I would take a decongestant along with pain meds for the first 48hrs and monitor the area. I truly wouldn't be worried and just try to keep it clean.