Social Security provides a guaranteed source of income in retirement, but what many don't realize is that you're not guaranteed to keep it all. Some retirees owe taxes on their Social Security benefits, but it all depends on your income. Here's a closer look at how your retirement fund withdrawals play into all of this.

For 2018, the basic structure of Social Security is the same in terms of how workers are taxed and how benefits are calculated and paid.

When we think about when to file for Social Security, age 68 doesn't often come to mind. After all, it's not a particularly notable age on the spectrum of when to claim benefits.

Is your retirement forecast rainy or sunny? Do you see a green light on your road to retirement or are you stopped by a red light? Is your projected retirement age older than you’d like?