Hello there, @Andrei Borodin. I appreciate your update.

I can see the urgency of getting your sync issue resolved. Let me route you to the best support who can investigate and provide the appropriate fix for this matter so you can connect your QuickBooks Online (QBO) and QuickBooks Time accounts.

Since the Community is a public forum, and we'll need to collect some personal information to pull up your account, I encourage you to reach out to our QuickBooks Time Customer Care team. They have all the necessary tools to check the cause of the connection error you've encountered and guide you with a fix.

To do this using the QuickBooks Time computer app, here's how to reach them via chat:

1. For help options, select the Find answers and get help icon.
2. Search existing product help articles.
3. If you can't find an answer to your question, select Chat Now to reach QuickBooks Time chat support.

There are other contact options (i.e., phone) that QuickBooks Time offers. To know more about them, please refer to this article: Contact QuickBooks Time support.

Once the issue is resolved, you may also want to check out this article as your reference to guide you in tracking and managing employees' timesheets in QBO: Track and manage QuickBooks Time in QuickBooks Online.

Please don't hesitate to keep us posted on how it goes in the comments below. If you have other concerns about syncing your QBO data to QuickBooks Time, I'm always ready to help. Take care, and I wish you continued success, @Andrei Borodin.