contacted Comptroller of Maryland 4-19-21. they have updated to a Schema 3.0 for processing unemployment exclusion/taxability.  any returns (i have one) it seems with unemployment, even if less than $10,200, will eventually be rejected.  Per Intuit, today, we will have an update on Friday April 23.  We will have to update our program and re-submit any rejected or new returns with any unemployment compensation.

@dascpa fyi