The 33-year-old actress, who played policewoman Charlie Buckton on the soap, left last year to pursue a career in Los Angeles.
Her character was apparently killed off the show in January after suffering fatal gunshot wounds.
According to the Herald Sun, Anderson will be filming "a handful" of new episodes in December, to air next year.
Anderson said of her return: "I told my mum and dad that I was coming back, and they almost fell off their chairs. They said: 'Hang on, didn't Charlie die?'
"It's hilarious, because this time 12 months ago I was keeping it the biggest secret from everyone as to whether Charlie would live or die, and now I'm in the same boat again as far as not giving anything away."
A 90-minute season finale episode of Home And Away airs Wednesday (November 28) in Australia.