March 30, 2017 18:37 Updated Follow Please fill out this form. Note: an election to make pre-tax contributions to your ASA cannot be changed until you retire or go to work for a different employer. Learn more about pre-tax voluntary contributions. Related articles Am I allowed to make voluntary contributions to my PERF plan? How do I make voluntary post-tax contributions to my Annuity Savings Account? What are voluntary post-tax contributions? How can I change the federal income tax withholding election for my retirement benefit? What are voluntary pre-tax contributions?