Hi
As property jointly owned by married couples is normally split 50/50, you will need to submit a claim for an alternative split, if not already done so.
This is at
Declare beneficial interests in joint property and income
and you would include a copy of the tennants in common document. You do not need a trading account for this and you both need to submit a separate tax return.
Please note if you have not already sent the form 17 to HMRC, the alternative split cannot be backdated.
Thank you