If you are thinking of filing an online self assessment you need to make sure you leave time to register for an online government gateway account. It is much quicker than it used to be as the system uses one time password (OTP) technology. This means that a password that is valid for only one login session or transaction is sent to your mobile phone each time you access your account.
However, the best advice we can offer is to complete your return as soon as you get it.
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