Different Aquisition costs for tax & book depreciation - Fixed Assets

Hi Experts

Would appreciate any help on my problem below

My client is using both Book & Tax depreciation areas for their Fixed Assets

However, they require different Aquisition costs - ie: Book Aquisition costs for depreciation calculations maybe $1000 but the Tax Aquisition costs for depreciation calculations is $1500

Can anybody assist with way to importtwo different APC values - one for Book and one for Tax

Regards

Kerrie