@Yawata If you are receiving military retirement pay and NOT Military Disability Retirement Pay then the retirement pay is taxable federal income.
Go to this website for information - https://myarmybenefits.us.army.mil/Benefit-Library/Federal-Benefits/Federal-Taxes-on-Veterans-Disabi...
Go to IRS Publication 525 page 18 Military and Government Disability Pensions - https://www.irs.gov/pub/irs-pdf/p525.pdf#page=18
