Hi Braitt - and welcome to the site.
I don't understand how the Inland Revenue can have frozen your husband's bank account. Do they have an injunction in place? Please provide more information on this.
You cannot be held to be liabile for your future husband's debt - even when you are married, but obviously it is sensible to establish exactly how much is owing as soon as possible. Does he have an accountant who is working on this for him?
Good luck with the wedding, and definately don't postpone - that will leave you in more debt!
Regards, Melanie Giles, Insolvency Practitioner for over 20 years.
View my IVA blog at:
http://melaniegiles.blogs.iva.co.uk