I've just started using payroll, can i enter moneys paid to myself before this?

Hi gq1, 

It is possible within the payroll system to enter in employee opening balances either through manually enter or importing opening balances from another payroll provider. 

I would encourage you to click here to see 'How to set up opening balances in QuickBooks Payroll'

If you get stuck along the way or have any further questions our team is happy to assist so please don't hesitate to contact  for support.

Thanks, 

Steven