How can I add my part-time employment paye income from another business (not related to my own business)?

Hello there, @ellenaforster, 

Let's go to the Employees tab so your employer can add your part-time employment PAYE income from another business. I'll guide you through the steps. 

However, I'd first suggest visiting the HMRC website. This will serve as your guide in entering the necessary information within the program. 

If your employer is using the Standard Payroll, here are the steps: 

1. Go to Employees from the left menu. 
2. Click the employee's name. 
3. Choose Pay History. 
4. Select By other employers. 
5. Fill in the necessary details. 
6. Click Save. 

For PaySuite, repeat the first two steps above. Then, select Tax & National Insurance and click P45. On the P45 (Part 3) - Details from Previous Employer page, enter the necessary details and click Save. You can see the screenshot below for your reference. 

Here are steps if your employer is using Advanced Payroll: 

1. Go to Employees from the left menu. 
2. Select the Employees tab. 
3. Click the employee's name. 
4. Choose Opening Balances.
5. Enter the necessary info. 
6. Click Save.

There are three payroll versions for QBO UK. To learn more about each version, I suggest checking out these helpful hub articles: 

• Standard Payroll
• PaySuite
• Advanced Payroll

I'm just a comment away if there's anything else you need. Have a good day.