The number of calories to eat per day depends on the number of calories burned per day. For example, an adolescent boy requires far more of a calorie intake than an adult. This is because; young people burn more calories a day as their metabolism is high.
At the end of the tax year, you will get a form P60 which sets out the total amounts paid to you and deducted from you for the previous tax year. A tax year runs from 6 April one year to 5 April the following year.
If you file on a fiscal year basis (a year ending on the last day of any month except December), the due date is 3 months and 15 days after the close of your fiscal year. In general, the tax shown on your return should be paid by the due date of the return, without regard to any extension of time for filing the return.