Can this be undone? Quickbooks payroll sent my paycheck via direct deposit, then pulled it back, then billed my checking account for payroll taxes! HELP!

Let me route you to the right support, bh-tekrisq-com.

Once the paycheck was already submitted, we can no longer stop the direct deposit process. You can read through the Can I cancel Direct Deposit payments after they're sent? article for more insights. Since it was being pulled back and billed your checking account for payroll taxes, I'd suggest contacting our Payroll Support Team. They'll pull up your account in a secure environment and help you with this one. You may send a message via chat, call us at a time convenient to you, or we’ll get in touch with you instead. To ensure we address your concern, our representatives are available from 6:00 AM to 6:00 PM on weekdays and 6:00 AM - 3:00 PM on Saturdays, PST. See our support hours and types for more details about this one. Here's how:

1. Go to the Help icon on the top right. 
2. Enter your concern in the search field.
3. Choose Talk to a human.
4. Click the OK. To get you to the right human, in a few words, tell me what you need help with option and tap I still need a human. 
5. Press Contact us.
6. Tick Continue. 
7. Choose Message an agent or Get a callback.

Feel free to visit our Payroll page for more insight about managing your payroll in QuickBooks. 

I'd like to know how you get on after contacting our support, as I want to ensure this is resolved for you. Just reply to this post and I'll get back to you. Take care always.