If we did not create payments on accountm, we would not be able to create them now.
You can make payments into your account in advance if you wish.
Please see guidance
These paymentds are credited to your Self Assessment account.
If you have not already registered as a sole trader you should do this to ensure your Class 2 National Insurance for Self-Employment is corrected calculated.
Understand your Self Assessment tax bill
Pay your Self Assessment tax bill