Rounding of income values to integer numbers

Hi, I'm trying to fill out my self-assessment online form, and I have issues with rounding. I enter a value with two decimal places in "Pay from - total from your P45 or P60. Enter the amount before tax taken off:". However, as soon as I start entering other values, the form automatically replaces the decimal part of the income number with ".00" and rounds income down to an integer value with zeros after the decimal point. The same thing happens with "Untaxed UK interest". In contrast, the value in the "UK tax taken off" field is not being rounded. Can you please help - is this an expected behavior or a bug in the online form? Should I round employment income and bank account interest in any way? Thanks

Hi
Some boxes dont accept 'pennies' so just put in the actual pounds received, rounded down.