People who receive tax relief have only a week left to inform HM Revenue & Customs (HMRC) about changes in their circumstances or income.
Customers whose circumstances have changed in the past year or who have received a letter to reconfirm their income details should contact HMRC before the July 31 deadline.
Failure to respond on that date could mean people receiving incorrect tax credits and may have to repay overpayments.
Tax credits help supplement the amount of money that comes in for people on low incomes.
People are also being warned about scams, with criminals claiming to be messages from HMRC as the deadline approaches.
If someone is texting, emailing, or calling and claiming to be from HMRC, saying that a customer can renew a tax credit or access financial help, and ask for credit or banking information, it’s probably a scam.
Information on recognizing genuine HMRC contacts is available at gov.uk website.
People can forward suspicious emails from HMRC to [email protected] and text messages to 60599.
If anyone thinks they have been a victim of a scam, they should immediately contact their bank and report it to Action Fraud.
Angela MacDonald, HMRC’s Director General for Customer Service, said: “Tax credits provide our customers with much needed financial support. But we know that many customers leave until the last minute to extend their tax credits.
“Now is the time to renew your tax credits, you don’t have to wait until the July 31 deadline.”
Customers who have received an annual appraisal package or text message and have already made their statement, including confirming their income and circumstances, don’t need to do anything else, HMRC said.
However, customers should contact HMRC immediately if they disagree with the information in the package or letter or if they need to tell them of any changes.
In May, HMRC confirmed that people who are unable to work their normal hours due to coronavirus would still receive their usual tax credits.
It said that those who work fewer hours due to coronavirus or who have been laid off by their employer will not have their tax credits affected if they are still employed or self-employed.
These customers do not need to contact HMRC about this change and it will use the information it contains about the number of hours they normally work.
However, people should notify HMRC if they or their partner lose their job, are fired, or stop trading.
Customers can log in gov.uk to check the progress of their renewal. They can also use the HMRC app on their smartphone to extend their tax credit, view their payment credit schedule, and see how much they’ve earned for the year.
More information is available at www.gov.uk/manage-your-tax-credits. Tax credits are gradually being replaced by Universal Credit.