though in fairness you work at the VA so it doesn't really matter since they're not really billing for any of this. I remember in residency the VA psychiatrists would frequently document support psychotherapy as something that was explicitly not psychotherapy for these purposes (for example discussing medication adherence, exploring pt's ambivalence/motivation to take medications is not supportive psychotherapy for these purposes and is counted as counseling as coordination of care) - but it doesn't matter in the VA system.
If you are actually billing, most people don't care about start and stop times (which would be ridiculous anyway as the open secret is that there is NEVER a separately identifiable psychotherapy portion of a visit) but you should put how much time was spent providing psychotherapy for example "This was a 30 minute visit with E&M and 20 mins of supportive psychotherapy)" I will also add something about the techniques such as "provided empathic validation, praise, identifying and naming emotions, reflection" and leave at that, and that appears to suffice.