We know that mortgage interest can be deducted expense against rental income.
When we purchased a property initially, we did not get a mortgage for it. The rental property has gone through 3 tax seasons. If we get a (first) mortgage now against the property now, can we deduct the interest as an rental expense in future years.
Additional Question, can 2nd, 3rd, mortgage against a rental property be taken out of another property and deduct its interest as rental expense.