I got back a lesser amount of $$ this year. Not seeing any impact from mortgage interest or property taxes ???

[Ashby]

It could be likely that it was better for you to take standard deduction this year instead of itemizing with things like mortgage interest and property taxes.

The standard deduction is now $12,000 for single and $24,000 for married filing jointly. 

The primary reason you are seeing less of a refund is that the paycheck withholding tables were changed last year to reflect lower tax rates caused by tax reform. People are having less withheld from their checks and are subsequently seeing smaller refunds in many instances.