Excepted estate in 2022

I am ready to apply for probate for my late mother who died June 2022. This qualifies as an excepted estate as it is under £650K and we are wanting to make use of my father's nil rate bands as he died in 1999, my mother was sole beneficiary. Do I need to do anything other than apply for probate (online)? The helpline indicated that as Inheritance Tax is not due (using the checker tool) I do not need to report anything to HMRC. Do I need to apply in any way to use Dad's nil rate band, the helpline suggested that I need only answer "Yes", I am "claiming the unused IHT allowance...of the deceased's late spouse" on the probate application following the rule change in January this year. Is this correct?

Hi,

Please contact the Inheritance Tax team for advice:

Inheritance Tax: general enquiries

Thank you.

Thank you. I tried that first and was told they could only help with questions about paper forms actively being completed not the questions I have listed above.

Thank you. I tried that first and was told they could only help with questions about paper forms actively being completed not the questions I have listed above.