HMRC has started to recover overpayments of Self-employment Income Support Scheme (SEISS) grants. From April, HMRC is writing to taxpayers whose entitlement to the fourth or the fifth SEISS grant has reduced by more than £100 to ask them to repay amounts that were overpaid. Entitlement to the fourth and fifth SEISS grants can be affected by an amendment to a tax return. HMRC's letters include an assessment and a date by which you must make the repayment. If the payment is over 30 days late, a late payment penalty of 5% of the unpaid tax will be applied. Even if you do not receive a letter, you must tell HMRC within 90 days if an amendment to a tax return affects your entitlement. Anyone who needs to repay grants can make use of HMRC online tools to help them calculate what they owe. Individuals who receive a letter from HMRC are required to use the payment reference beginning with X when making their repayment. If you are not able to pay in full, you may be able to set up a Time to Pay arrangement with HMRC. Internet links: GOV.UK