Missed Contributions During Military Leave
On re-employment, participants who have been on a military leave of absence may have increased 401(k) contributions deducted from their paychecks to make up for contributions missed while on leave. You may take up to three times the period you were absent for duty up to five years to make up missed contributions due to military leave. If you are making Roth contributions upon re-employment, they are treated as made in the taxable year of qualified military service that you designate as the year to which the contributions relate.
For additional information contact PERA.