The HMRC has issued several alerts affecting UK residents and expats. Britons may be due an unexpected tax refund of over £3,000. However, UK expats are being pursued for £100 they reportedly do not owe. There is also a warning for thousands of parents to check for letters this week or risk losing £1,300 in child benefit cash. State pensioners are also affected by being stuck in the wrong tax code. Britons risk a 7.75% tax charge with an important deadline looming in two weeks. HMRC alerts also include potential losses of £161, a need for £50k cash to avoid financial difficulties, and additional warnings about £588 and £768 charges.