Doctor says i have invasive squamous cell carcinoma on my chest(sternum), what is the best way for it to be removed

Most likely a surgical excision would be best, but it depends on the size of the site, as well as the margins that came back from the initial biopsy. We usually use Mohs when we need to preserve the utmost amount of skin, so in areas like the face, ears, hands, groin. Most people have more than enough area on the sternum to do a surgical excision and clear the margins, without resorting to Mohs. Your best bet is to talk to your dermatologist about what is going to be the best procedure to remove the cancer in your specific case.

"This answer has been solicited without seeing this patient and cannot be held as true medical advice, but only opinion. Seek in-person treatment with a trained medical professional for appropriate care."