Sadly not I am afraid. You will have to give the Tax Credits Office a call to inform them of your actual figures and you must do so by 31st January.
If you fail to meet the January deadline, your tax credits won’t stop but the tax credits you receive from 6th April may not be accurate. And if you’re overpaid, you may have to pay it back later- and you may even be charged a penalty.
HM Revenue & Customs telephone numbers change fairly frequently, so it's always best to check their website (www.hmrc.gov.uk) for the present Tax Credits Office number.
If you would like any assistance with the completion of your accounts, tax return or Tax Credits affairs, please feel free to contact your local TaxAssist Accountants office.