How do I set up a payroll deduction for employee's account receivable? Do I need to invoice the employee (as a cust)?

You can set up a payroll item deduction from the Payroll Item List in QuickBooks Desktop, ShonJ.

Here are the steps to complete the process:

1. Click Lists at the top menu bar and choose Payroll Item List.
   
2. From the Payroll Item drop-down, click New.
   
3. Select the Custom Setup and hit Next.
   
4. Enter the deduction's name and click Next again.
   
5. Follow the on-screen instructions until you reach Finish.

Then, add the payroll item to the specific employee to deduct the amount in the paycheck. Here's how:

1. Go to the Employees menu, then select Employee Center.
   
2. Select the appropriate employee, then click the pencil icon to edit.
   
3. Go to the Payroll Info tab, then add the Employee Purchases payroll item in the Additions, Deductions and Company Contributions section.
   
4. Enter the amount of the purchase and OK once done.

For your payroll reference check out this article: Payroll 101. It contains more information about the different types of compensation as well as on what are the types of federal forms you need to file. Also, this will provide you a sample breakdown of a paycheck.

Please know I'm ready to assist further and answer any follow-up questions you have in mind. Have a good one.

How do I then get the money from my payroll liability acct to the employee's accounts receivable?

Hey there, @ShonJ. 

Thanks for reaching back out to the Community. Allow me to provide you with some information about moving money from your Payroll Liability accounts to the employee's accounts receivable. 

To see which route is best for your business, I recommend consulting with your accountant about this subject. They'll be able to give you the best accounting advice for your company. If you don't have one, no worries. Here's a link to help find one near you. 

Feel free to drop me a reply below if you have any other concerns or anything in QuickBooks. I'll be around to help and ensure you're taken care of. Have a great rest of your day!