If I was on long term disability and then applied for my SSDI and was approved will my income increase after age 66 and 10 months

Hi. I can't tell you about any income you receive other than Social Security, but assuming that you don't return to work then your Social Security benefit rate won't increase when you reach your full retirement age (FRA) aside from cost of living increases. Social Security disability (SSDI) benefits are paid at a rate of 100% of the disabled person's primary insurance amount (PIA), which is the same rate as they'd collect if they started drawing their Social Security retirement benefits at FRA. That's why there is no change in the disabled person's benefit rate when their SSDI benefits are automatically converted to Social Security retirement benefits when they reach their FRA.

Best, Jerry