[maccard]

Not at all. The list of things you can claim for is very limited, and the majority of them are automatically applied. Having to actually contact HMRC is a rarity. If you are salaried employee with no extra cash coming in, you don't need to do anything.

Another example of how the system works - if you are working two jobs, both as a regular employee, HRMC will instruct your employer as to what your tax deduction should be for that paycheck to make sure that things are balanced. For <some large number>% of people, this will be correct, and if it's not, it will rectify itself over 2 or 3 pay periods. If that's _still_ not enough, a phone call to HMRC (usually taking less than 10 minuts for the two times in a decade I've had to do it) will resolve the issue in your next check.