This article will explain how you can copy over a contract's primary address into the billing address field.
Access Contracts from the Contracts section of the Community module.

- For new contracts, click on New Contract; For existing contracts, select your contract by clicking on the Contract ID in the Contract list.
- Enter the Administrative Contact information.

- In the Billing Contact, check the box for Same as Primary.

- As soon as you check that box, the Administrative Contact information immediately copies over into the Billing Contact information.

- Either Apply or Save your changes.