TaxReturnChangeStatus

public void TaxReturnChangeStatus(EntityReference taxreturn, OptionSetValue state)
{
    //Cascade tax return status to it's child records

    string[] TaxReturnSchedules =
        { 
            "tt_bankinterest",
            "tt_capitalgain",
            "tt_employment",
            "tt_giftaid",
            "tt_pensionincome",
            "tt_personalpension",
            "tt_propertyincome",
            "tt_businesstax",
            "tt_ukdividend"
        };

    foreach(string TaxReturnSchedule in TaxReturnSchedules)
	{
        tracingService.Trace($"SetState for {TaxReturnSchedule} for TaxReturn {taxreturn.Id}");

        QueryExpression qe = new QueryExpression()
        {
            EntityName = TaxReturnSchedule
        };

        qe.Criteria.AddCondition("tt_taxreturnid", ConditionOperator.Equal, taxreturn.Id);

        EntityCollection ScheduleRecords = crmService.RetrieveMultiple(qe);

        foreach (Entity ScheduleRecord in ScheduleRecords.Entities)
        {
            SetStateRequest req = new SetStateRequest()
            {
                EntityMoniker = ScheduleRecord.ToEntityReference(),
                State = state,
                Status = new OptionSetValue(state.Value == 0 ? 1 : 2)
            };

            crmService.Execute(req);
        }

        tracingService.Trace($"{ScheduleRecords.Entities.Count} record(s) updated.");
    }
}