My Simple IRA only allows $13,000 to be deducted every year. However I'm allowed to put in $16,500 as a catch up contribution. How do I achieve this in this in QB?

You can create a new catch up deduction item for the Simple IRA, @indyoxifresh. 

In QuickBooks Online (QBO), the option to edit the IRA deduction item is unavailable. QBO follows IRS and each item has its maximum amount limit.

Here's how to add a new deduction item:

1. In QuickBooks, navigate to the Payroll menu.
2. Click Employees.
3. Proceed to Step 5, and then select Add a new deduction. 
4. From the Deduction/contribution type drop-down, choose New deduction/contribution and Retirement Plans.
5. Pick the desired Catch-up type from the drop-down list.
6. Input the necessary details and then hit OK.

To know more info about the retirement plan deductions and contributions in QBO, please head to this retirement plans link. 

Also, to have a view of your created company deductions, you may open the Payroll Deductions/Contributions report. Here's how:

1. In QuickBooks, go to the Reports menu.
2. Scroll down to the Payroll section and look for the Payroll Deductions/Contributions report. 

Feel free to come back here again if you have other concerns about retirement plans in QBO. I'm here if you need further assistance. Have a good one. 

How do I get to step 5?  You skipped over step 3 & 4?

I'm here to share the complete steps to add a new deduction item, Elojo.

Here's how:

1. Go to the Payroll menu.
2. Select Employees.
3. Locate the name of your employee, then click to open.
4. On the Does [Name of the employee] have any deductions? (Examples: retirement, health care) section, click Add a new deduction.
5. From the Deduction/contribution type drop-down menu, choose Retirement Plans.
6. Choose the desired Catch-up type from the drop-down list.
7. Input the necessary details and then click on OK.

For more information about the process, I suggest checking this article: Add or Edit a Deduction or Contribution.

Additionally, I encourage you to visit this article to help you track your business finances: Run Payroll Reports.

In case you have follow-up questions about running payroll, I suggest clicking the Reply button. This way, we'll be able to help you out.