This was my first return collecting social security. My wife is still employed. Our adjusted gross income was $251,876, which made 85% of my SS benefits taxable. TTX did not recognize this, and placed "0" in box 6b. Received a letter from the IRS that I know owed them $969, instead of the rebate that TTX calculated. I have used TTX for many years and trusted it fully. K now better now!