We asked HMRC whether there were potential security concerns that could be posed by the third–party MTD software taxpayers use to submit their tax returns, including whether there were risks to HMRC’s own systems.63 In written evidence provided after our evidence session, HMRC told us it takes security very seriously. It said all data sent to HMRC systems is monitored for fraud prevention, and to ensure that customer data is safe. It also said that it sets out strict specifications for third–party MTD software products in terms of cyber–security and the security, storage, management and processing of customer data.64