Hoping for some insight about my actual pay and whether I’m eligible for Combat Related-Special Compensation

I received my 4808 and I’m trying to sort through everything. I’m not sure how to answer the online calculator.

70% I’m active duty. Over 18 years. Recommended disposition is: Permanent. Other notable information.

PROXIMATE RESULT OF
PERFORMANCE
OF ACTIVE DUTY OR
INACTIVE DUTY TRAINING OR INCURRED IN LINE OF DUTY DURING WAR OR NATIONAL EMERGENCY

Yes

Combat related: yes

Finally if I was awarded CRSC, is it an additional payment on top of my compensation? Or is it just make me tax free.