Activate a TJX Rewards credit card by first clicking Activate My Card on the TJX Rewards portion of ReviewMyAccount.com. After that, click on the button that says Register and Activate under the text that says Activate Your Card.
The activation process goes through five basic steps, according to ReviewMyAccount.com. Input your account number located on the front of your credit card during the fist step. Click the Next button to proceed to the next part of the process. The company states that you must be the primary account holder to register, and you need to have the credit card in your possession as you input information. You must have other information to complete the card's activation, including your email address, last four digits of your Social Security number, date of birth and your mother's maiden name.
Validate certain personal information during the second step of the activation process, and select security questions during the third step, notes ReviewMyAccount.com. You are then prompted to select a security image before completing your account activation. This process also creates an online account to manage your TJX Rewards credit card.
Purchase items from T.J. Maxx, Marshall's, HomeGoods, Sierra Trading Post and TJMaxx.com, with your TJX Rewards Platinum MasterCard, states T.J. Maxx. Earn five points for every $1 you spend at the aforementioned retailers, as of May 2015. Customers earn a $10 rewards certificate on every 1,000 points earned through the program.