Could anyone advise the procedure I should use to query an invoice sent to my mother from her accountant? Is there a specific terminology that should be used?
The invoice was very vague and when questioned they said that the info on the invoice was incorrect and that the work was for (b) not (a). No satisfactory info.
One person told me to get it 'taxed' but that sounds a bit over the top?

Thanks

If you are unhappy with the details of an invoice, then go back to the issuer and ask for a new invoice that gives better detail.

Guess I haven't spread enough reputation :-) -- but yes, I agree totally! The only one who can straighten out the problem is whoever issued it. That's who you "query." And having come from an accountant, I would hope they can manage to get it straightened out. (If not, she needs to find another accountant, don't you think?)