Ah okay. The procedure you need to follow is at https://www.irs.gov/individuals/military/special-tax-considerations-for-veterans
Note that you will have to mail your return this year in order to do this. If it's retroactive back to previous year or years, then you'll need to file an amended return for each year. Note that it's important to mail each return in it's own separate envelope too, per IRS guidelines.
