Hi Vihango Shah,
There is no need to re-submit a form 17 and declaration of trust.
If HMRC have replied to you accepting the unequal share, there will be a record of this linked to both of your tax records.
The change that the declaration and the form 17 requested, will remain in force until, your interests in the property or income change, or you stop living together as a married couple.
You can contact HMRC if you choose and ask for a copy of the confirmation letter.
You can do this by contacting our Self Assesment helpline.
Self Assessment: general enquiries
Thank you.