Deductions & credits

Thank you, @Cynthiad66 

I am not itemizing deductions, as per Turbo Tax's recommendation (standard is better for us).  But still, I cannot claim mortgage interest for my home office, correct?

A follow-up question. The other reason I am breaking the 1098 total amount is that the months I did not have a home office, I was abroad and meanwhile i rented my home at fair market value, for the entire rest of the months. 

So–am i correct to assume that I cannot claim mortgage interests for my home office but ii can for the rental. And would it still be preferable to split those amounts up? part for renta, part for personal (no home office). But these amounts differ from my 1098, as they are divided into 2. Would it be problematic to the IRS to see my mortgage interests split into 2, instead of a 1098 for the full amount? ? Thanks so much