What you see is what you get. There’s no more information in the official records.

His obituary which appears in the Confederate Veteran Magazine, Vol. 5, page 205, indicates he was a Captain serving the entire war in the 26th Virginia. However, there is no record found there.

From the information obtained on this Goggle search, I would suspect that your man’s record is in the 34th Virginia and Commisarry Department.

A Goggle search Confederate soldier Philip Tabb Yeatman yields a number of hits on him. See:

https://www.google.com/search?client=safari&rls=en&q=Confederate+soldier+Philip+Tabb+Yeatman&oq=Confederate+soldier+Philip+Tabb+Yeatman&gs_l=serp.12...10042.19683.0.21541.21.14.0.7.7.0.196.1726.0j14.14.0.msedr...0...1c.1j2.61.serp..1.20.1635.oL5K4I9t2Uc