Please see the useful links below:

Ways to pay your self assessment tax:   www.gov.uk/pay-self-assessment-tax-bill/overview

Printing a payslip to pay by post:  www.hmrc.gov.uk/gds/payinghmrc/payslip-sa1.htm

Also please note we now take payments for your invoices by debit and credit card, either in person or over the phone.