If Ex husband will not give me tax returns to file a property tax return, I believe he's claiming my tax deductions and me,can you help me find out the answers to these Q

[Critter]

Only you have access to your returns ... if you don't have access then you will need to get it from him which may be a legal issue  or  get a transcript of the prior year returns from the IRS ...

You can get a return transcript from the IRS for free :  http://www.irs.gov/Individuals/Get-Transcript

For a $50 fee you can get a copy of the return from the IRS:  https://ttlc.intuit.com/questions/1901218-can-i-get-a-copy-of-my-tax-return-from-the-irs