user: How do I opt in if I want my legacy claim or appeal to be considered in the modernized system?[NEWLINE]agent: you disagree with a VA decision you received before February 19, 2019?[NEWLINE]user: yes[NEWLINE]agent: you can opt in to the modernized review system after you ve received a VA Statement of the Case SOC or Supplemental Statement of the Case SSOC[NEWLINE]user: how can i get a SOC or an SSOC[NEWLINE]agent: You must file a Notice of Disagreement VA Form 21 - 0958 within 1 year from the date of your decision. Find out how to file a Notice of Disagreement[NEWLINE][BOUNDARY][NEWLINE]user: What should I talk to a senior reviewer?[NEWLINE]agent:  During the call, you and/or your representative can talk about why you think the decision should be changed and identify errors[NEWLINE]user: if i request a call with a senior reviewer?[NEWLINE]agent: they ll call the phone number that you or your representative provided on the Higher - Level Review form to schedule a time to discuss your case with you. The senior reviewer will try to reach you or your representative by phone twice.[NEWLINE][BOUNDARY][NEWLINE]user: what do i do to get a SOC or SSOC