allocation of Home Mortgage interest and RE one Schedules A, C and office in home

[ann-wenger]

My client has a business in she home and also rents part of the home to a tenant.  When i put the home Mortgage interest and Taxes on he Schedule E column B and then again on the office in home worksheet the number that shows up a Schedule A as personal Mortgage interest and Property taxes is incorrect.  It shows up as more than the whole real Estate tax and Mortgage interest.

Is there a way to allocated these expense form two different forms?  I so can you please call and expalin that to me.  I have spent 2.5 hours with tech support and no one can figure this out.

[sjrcpa]

Let's say the rental is 25% of the home. Put 25% of the mortgage interest and RE tax on Schedule E.

Then use the remaining 75% for the 8829. The software will calculate business use of home percent and use that as a Schedule C deduction and put the rest on Schedule A.