Working Tax Credit (WTC) | GOV.UK
Seven days a week - 8.00am to 8.00pm
0345 300 3900 or 0345 300 3909 (textphone)
0345 300 3900 or 0345 300 3909 (textphone)
Seven days a week - 8.00am to 8.00pm
Helpline is open Monday to Friday - 8.00am to 6.00pm