What Kind of Tax Return Can I Expect to Get Back Now That I Pay Mortgage Interest?

mortgage

My wife and I just bought our first home in Los Angeles and I know that this coming tax year we can deduct mortgage interest and property tax. We both have full-time jobs, file jointly (both filed with 0 claimed dependants), and have a, before taxes, combined income of roughly $100k. The mortgage interest and property taxes for the year will total just over $30k. What kind of number could I roughly expect to get back in my taxes this year?
We don’t have any kids and no other deductable interest. Last year our return was under $3k.