The Board has determined that the appellant's discharge was not based on willful misconduct and is therefore not a bar to VA disability compensation benefits. The appeal for service connection of the left shoulder injury is granted.

The Board has decided to remand the case due to errors in verifying the Veteran's periods of active duty for training (ACDUTRA) and inactive duty for training (INACDUTRA), obtaining complete service treatment records, and scheduling a VA examination. The AOJ is required to correct these issues.

The Board has denied service connection for residuals of injury to the left shoulder and remanded the issue of service connection for residuals of injury to the left knee. The Veteran's claims are being returned to the agency of original jurisdiction (AOJ) for further development.

The Veteran's PTSD is currently rated at 70 percent since April 3, 2018. The Board finds a need for additional medical evidence to determine if the disability warranted a higher rating prior to that date.,The Veteran's lumbar spine DJD and DDD warrant an increased rating beyond the current 40 percent assigned. A remand is required to assess the severity of his condition, including whether functional equivalent of ankylosis exists due to painful flare-ups.,A compensable initial rating for scars associated with back surgery and left shoulder surgery is needed as the Veteran reported painful flare-ups but no estimated loss of motion was provided by the VA examiner.,The Veteran's scar on his midline lumbar spine requires a remand to assess its severity, including whether it meets criteria for a compensable initial rating.

The Veteran's left shoulder disability is rated at 20 percent, and the Board found that it does not warrant a higher rating based on current evidence of record.