Does anyone know how I write the following in Mandarin to give to the taxi at the airport:

The name of is hotel is '北京国际艺苑皇冠假日饭店'.
And the address is '北京东城区王府井大街48号'.

You must refer to Capital Airport, right?
The cab fare is CNY 80 to 90 in the daytime.

Thanks Emma. I arrive at night at 10 pm.

Will it be difficult to find a cab?

As far as I know, there are lots of normal cabs outside the airport. But sometimes, you need to queue up for getting a cab. If your time is tight, you can book a vehicle in advance.
TravelChinaGuide has car rental service that can take you to the destination. The contact information is bookingtravelchinaguide.com.

Thank you Emma. Your assistance is greatly appreciated.