How can you update TX SUI rate to effective date of 01/01/2021? When I do this, it says it effects paychecks we've already created but the email from QB says to do this.

Hello @TBM1

As much as I'd love to offer help and share how you can get rid of the error message while updating your taxes, we've got a separate team that can better address this in no time. Thus, I'd recommend contacting our Payroll Care Team.

With their tools, one of our specialists can pull up the account we have on file and confirm the information of the email you received so you can update your taxes successfully. You can do so by following the steps outlined below:

1. Go to Help.
2. Select Contact Us.
3. Enter Error message when updating SUI taxes in the What can we help you with? field.
4. Click Continue.
5. Choose a channel where you wanted to connect with our dedicated team.

In the same manner, here's an article you can read to learn more about when are you able to connect with our support: Contact QuickBooks Products and Services Support.

On top of that, I've also included this reference helpful in understanding the recent updates mandated by your tax agency for all your payroll tasks: Browse all articles for your QuickBooks product.

Don't hesitate to post again here if you have other questions or concerns with QuickBooks tasks and navigations. I'm always around happy to help. Take care and stay safe!