Deductions & credits

you may have been getting advice based on the old rules.
since the standard deduction is now $24,000 for married,  and  your property tax is limited to $10,000, you would need a lot of mortgage interest i.e.$14,000 to exceed that and qualify for an itemized deduction.
If you want to refinance to consolidate, that's fine but it is probably not going to help you  on your tax-return.