House & mortgage are in my name, spouse & I pay the mortgage from a joint bank account. Can I claim 100% of the prop. deductions, if we both itemize & file separately?

My spouse and I have a joint bank account from which we pay our mortgage, however I bought the house before we were married and both the house & the mortgage are solely in my name.

We are wondering if I can solely claim 100% of the real estate tax paid and mortgage interest paid deductions, as long as we both itemize deductions on our separate returns. Also, should we split the other deductions 50/50?

How difficult would it be to refile our taxes in this manner for last year, 2017, the year that we were married?

Thanks in advance for your assistance!