A little more detail from Virginia on this issue:

All:

Due to a Virginia Tax system issue, taxpayers who e-Filed Virginia Individual tax returns (760, 760PY, 763) between 5/23/23 and 6/9/23 may have received letters stating that they failed to provide required schedules (Schedule A, Schedule OSC, Schedule CR).  These letters were sent in error.  Your clients do not need to provide us with copies of any schedules submitted with their returns.  There may; however, be legitimate letters requesting missing attachments, other verification, etc..

For any additional questions, the taxpayer may reach out to our customer service at 804.367.8031

Note: Paper returns mailed in may also be impacted