How is what, specifically, resolved? What needs to be resolved?

If you are asking about excluded wages for combat pay, that should already have been taken care of by how the data is reported on the W2.

See this:

https://www.irs.gov/individuals/military/tax-exclusion-for-combat-service

"There is no required action for you to receive the exclusion. Each military organization will automatically certify your entitlement by excluding reportable income on your W-2. If you believe you are entitled, and your W-2 reflects your full, unadjusted annual pay and benefits, contact your military pay office to issue a corrected W-2."