According to the QB support site, support for Enterprise is available all day, every day.  I spent almost all day yesterday working with QB tech support to install the upgrade. I've been trying to get help with troubleshooting and completing the upgrade to Enterprise 2024 (Desktop version) since yesterday about 3:15 pm CST, both by phone and online, and again since 6:35 am CST this morning.  Online, I get "You'll get a call in 5 minutes," and when I call in, I eventually get to a message that says the office is currently closed.  Any suggestions???  I have to run payroll today.