上个月收到HMRC的信，要我做TAX RETURN，不知道是什么原因，报税的工作，都是按周扣除的，而且2014年4月已经离职，之前税都有交，为什么还要做？账单上也只是说要交多少钱也没说哪一环节没交。不知道是不是因为之前改地址没通知他们，也不知道怎么现在就知道 我的地址了，说是AMOUNT OVERDUE 1600多胖子,请问应该怎么办？
Who must send a tax return
The tax year is from 6 April to 5 April the following year.
You’ll need to send a tax return if, in the last tax year:
you were self-employed - you can deduct allowable expenses
you got £2,500 or more in untaxed income, eg from renting out a property or savings and investments - contact the helpline if it was less than £2,500
your savings or investment income was £10,000 or more before tax
you made profits from selling things like shares, a second home or other chargeable assets and need to pay Capital Gains Tax
you were a company director - unless it was for a non-profit organisation (eg a charity) and you didn’t get any pay or benefits, like a company car
your income (or your partner’s) was over £50,000 and one of you claimed Child Benefit
you had income from abroad that you needed to pay tax on
you lived abroad and had a UK income
you got dividends from shares and you’re a higher or additional rate taxpayer - but if you don’t need to send a return for any other reason, contact the helpline instead
your income was over £100,000
you were a trustee of a trust or registered pension scheme
your savings or investment income was £10,000 or more before tax？？？ 这个是什么意思？HMRC会知道你银行存多少钱吗？？？求解。。。。。。。。。。。。。。。。。
还有如果不交会肿么样？？？？？？？？？？？？？？？？？？？？？？ 