Paying off mortgage

Wife and I both 64 and still working. We have about $190k ($160k mortgage and $30k home equity line) left on our house currently valued at around $850k. Have interest only mortgage that I add some additional principal to every month. Do I continue this or accelerate to pay off the balance? Our only deduction is property tax which is maxed at $10k due to the change in SALT so the interest payments on the mortgage do also help reduce our tax burden. Thanks.