You asked Hi I need to start calculating my tax for my freelance role and care work also how to I get a self employed reference number

Hey there, @jayne-upton-ntlw.

Let me help you accomplish your task in QuickBooks. 

Since you're subscribed with QuickBooks Self-Employed (QBSE). The program will automatically calculate your taxes for you. All you have to do is to enter your transactions and let QuickBooks handle the rest. 

 To view your financial summary, simply go to the Taxes menu.

With regards to your self-employed reference number concern, you have to register for Self Assessment to get it. Just click this link for more details: https://www.gov.uk/register-for-self-assessment/self-employed.

As soon as you're done, you will automatically be issued a UTR number.

Additionally, you can use Quickbooks’ Self Assessment tax calculator to get a sense of how much tax you’ll need to pay this year. 

Let me know if you need further assistance with this. I'm always around to provide answers and clarifications to your questions. Have a great day ahead and take care.