HMRC says 758,000 people still need to come forward for free £2,240HMRC says a savings stash worth thousands is waiting for 758,000 young people. View Image HMRC says 758,000 people still need to come forward for free £2,240HMRC says 758,000 people need to come forward for a free payment worth £2,240. HMRC says a s avings stash worth thousands is waiting for 758,000 young people. ‌Young people aged 18-23 are being encouraged by the taxman to find and claim their Child Trust Fund savings account. The average Child Trust Fund is worth more than £2,240.