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@HopeS  thanks and yes, i actually did the same thing as you outlined to let turbotax calculate the portion allocation for me:

total amount reported in form 1098 is $10,000, while the calculated relocation for personal use based on rental portion is $8,000. 

however as you see in the summary page, the turbotax adds up $10,000+$8,000=~$19K here. I think the correct amount shall be personal portion, which is $8000. 

so it seems a software error from turbo tax?

And Turbo tax put the amount $19K here, which i think is an error. So for California state Tax part, should it be the same amount as Federal amount, which is allocated for personal use, like $8,000? 

and where in the specific form i can check to make sure form is correct? schedule A for federal? how about for California state, which form specifically?