I'm not sure why you'd get those errors - can you try a different tax year and see if you get the same thing? You could also try adding these lines above where the ExecuteReader() happens - line 32 for my code - to see if it's able to even get the table names from the database: var schema = connection.GetSchema("tables"); foreach (System.Data.DataRow row in schema.Rows) { Console.WriteLine(row["TABLE_NAME"]); }  Might want to try uninstalling and reinstalling the Lacerte ODBC driver as well.

This is a small C# console program I wrote which uses the ODBC connection to query the Employer name for every client in a database and print it out. This could be modified to do something else with the data. I don't have an example using the .Net library but hopefully this helps show how one could use it. You would probably want to add some error catching with a Try ... Catch at minimum. using System; using System.Collections.Generic; namespace lacerte21sdktest2 { class Program { static void Main(string[] args) { //define data path containing clients var dataDir = @"C:\Lacerte\22tax\DEMODATA"; // connection string - ReturnType and TaxYear can be omitted if the DataDir contains only one type and year of data, it should figure it out var connectionString = $"Driver=LacerteDSIIDriver; ReturnType=Individual; TaxYear=2022; DataDir={dataDir}"; // create a connection to the database using (var connection = new System.Data.Odbc.OdbcConnection(connectionString)) { // first query the [DATA1-Client Info] table to get a list of clients by client number - field C1_0 var queryString = "SELECT C1_0 FROM [DATA1-Client Info]"; System.Data.Odbc.OdbcCommand command = new System.Data.Odbc.OdbcCommand(queryString); command.Connection = connection; connection.Open(); var clientList = new List(); // execute the query on the connection and loop through the result using (var reader = command.ExecuteReader()) { while (reader.Read()) { // add all of the client numbers to a list for later use - a Try Catch would be good here clientList.Add(reader.GetString(reader.GetOrdinal("C1_0"))); } } // now loop over the list of clients to get the employer name for each - need to check if clientList is empty foreach (var client in clientList) { // client details is in the [Client-Detail] table for each client, where Client is the client number // W2 employer is Series 11, Code 800 and the value is stored in the Description field var clientQueryString = $"SELECT Description FROM [{client}-Detail] WHERE Series=11 AND Code=800"; System.Data.Odbc.OdbcCommand clientCommand = new System.Data.Odbc.OdbcCommand(clientQueryString); clientCommand.Connection = connection; // execute the command and open a reader using (var reader = clientCommand.ExecuteReader()) { while (reader.Read()) { // read all of the results and just print the client number along with the employer name. // here is where you could do something else with this result, store it in a variable, etc. Console.WriteLine($"{client} employer: {reader.GetString(reader.GetOrdinal("Description"))}"); } } } } Console.WriteLine("Press any key to exit"); Console.ReadLine(); } } }  This produces this output: 02SAMPLE employer: His Employer 02SAMPLE employer: Her Employer 03SAMPLE employer: His Employer 03SAMPLE employer: Her Employer 05SAMPLE employer: Employer1 06SAMPLE employer: His Employer 06SAMPLE employer: Her Employer 09SAMPLE employer: His Employer 09SAMPLE employer: Her Employer 10SAMPLE employer: Taxpayer New York Employer 10SAMPLE employer: Taxpayer California Employer 10SAMPLE employer: Spouse Both State Employer 11SAMPLE employer: Taxpayer New York Employer 11SAMPLE employer: Taxpayer California Employer 11SAMPLE employer: Spouse Both State Employer 12SAMPLE employer: His Employer 12SAMPLE employer: Her Employer 14SAMPLE employer: Employer Name 16SAMPLE employer: His Employer 16SAMPLE employer: Her Employer 18SAMPLE employer: Employer 21SAMPLE employer: Company Press any key to exit 

Hi, I'm looking into your post, but it seems OK from my view. At the "User Groups" level, it seems like it shows me all the posts in all the subforums, so it might seem like this is in the wrong place, but the Lacerte SDK Group does show only the posts in this group, including this thread. I am seeing some posts that ended up in here last year that appeared to be for general Tax issues though. For example, in this thread, the post shows this navigation at the top: Intuit Accountants Community > User Groups > Lacerte SDK Group > Subforum Levels?      

This tool: QuickBooks TLS 1.2 Readiness Tool has been solving several issues related to this - the error sometimes doesn't seem related to sign-in but the underlying cause is usually a problem with the TLS 1.2 connection. Sometimes it shows up as a configuration or resource error, but if the error occurs right after sign-in, this solution is a safe bet.