If you need time to pay, contact HMRC as soon as possible. Use the number on the
latest letter you have from them. If you pay tax under PAYE, you can ring the Taxes
Helpline on 0300 200 3300. If you pay tax under Self Assessment, you can ring the
Self Assessment Payment Helpline on 0300 200 3822. If it’s a business debt, use
HMRC's Payment Support Service on 0300 200 3835, but you must do this before
the payment deadline