You must file a return for 2016 if: You have to pay tax for 2016. We sent you a request to file a return. You and your spouse or common-law partner elected to split pension income for 2016. See lines 115, 116, 129, and 210. You received working income tax benefit advance payments in 2016.
The minimum number of points to be eligible for retirement at the age of 60 with 20 qualifying years of service is 1,000 (50 points per year) with a corresponding retirement pay equal to 6.94 percent (1,000/360 x 2.5=6.94%) of basic pay.
You cannot start taking withdrawals from your 401k until you reach 59 years and 6 months of age (and the earliest for social security is 62) so you'll need to have some liquid assets saved for the mean time. If you're going to retire that early you'd need to have planned a budget for 40 (or 45) years. To decide if this is feasible you'll need to figure out how much income you'll need each year in retirement.