2 decimals after the dot are forcibly changed to 00 in the "Amount before tax taken off" field

Hi HMRC Support, The field below forcibly changes the amount I enter for the 2 decimals after the dot to .00. For example, if I enter the amount before tax taken off as '100123.63', then once I click on another field the last 2 decimals are automatically changing to '100123.00'. It results in incorrect amount entered and this cannot be changed. > (Field Name) "Pay from - total from your P45 or P60. Enter the amount before tax taken off:" Please note that the next field called "UK tax taken off pay:" doesn't have this issue and decimals are saved correctly and not replaced by 00. Could you please advise on what can be done with it? Many thanks, Victoria

This behaviour is normal, though poorly documented. The paper version of the tax return has lots of boxes which ask for whole pounds only - and has a note at the top of the paper form to explain how to round pennies. I am *guessing* that the online tax return was made to do the same rounding, so that people wouldn't pay different amounts of tax depending on which form was used. The rounding is actually always in favour of the taxpayer - incomes are rounded down, and tax already paid is rounded up. So, just complete the form using your expected figures, and whenever it wants to automatically round off the pennies, just accept that and carry on.

Hi MyName23

For the pay figure the system will round down to the nearest pound so you do not need to enter the pennies for this field. For tax deducted it will include the pennies.  

Thank you