value of estate changed after probate but still under threshold

having applied for probate for a small estate (100k) which is under the IHT threshold, I belatedly uncovered a gift that was made within 7 years. this changes the value of the estate (125k) but it is still well under the IHT threshold and no IHT is due. It does however affect the amount of unused nil rate band that is potentially transferable. I can easily change the amount of transfer of unused nil rate band requested on IHT402 (from 225 to 200 to transfer) but should I also change the probate (which has now been granted) and how do I do this? the estate should have been registered as 125 for the grant of probate not 100, but this gift only came to light by chance at a later date. thank you

Hi,

Please contact the Inheritance Tax team for advice.

Inheritance Tax: general enquiries

Thank you.