Macy
Macy's items can be returned at any location. If you have a voucher, you can return items in original form at any time. If you don't have a proof of purchase, you can get store credit at the item's lowest selling price within the last 180 days. 

Walmart

Walmart has changed its policy to accommodate the holiday shoppers. If there is a limited number of days an item can be returned such as with TVs and computers, if the item was bought between Nov. 1 and Dec. 24 the return period will begin on Dec. 26.

Toys "R" Us/Babies "R" Us
Items must be returned within 90 days, in new condition, and in original packaging. Also, the company reserves the right to refuse any returns if they do not meet their requirements.

Target
Customers must have a receipt or valid photo ID and return items in new condition within 90 days of purchase. The following must be returned with 30 days: eReaders, netbooks, tablets, cameras, camcorders, digital audio players, GPS systems, video game hardware, personal DVD player, and no-contract cell-phones. These may only be exchanged if opened: music, movies, video games and software. If items were purchased between Nov. 1 and Dec. 25, the 30-day refund period begins Dec. 26. 

Kohl's
"Return any item, anytime, for any reason," states Kohls.com. Whether you have your receipt or not, you can get a full exchange or store credit. 

Best Buy
Purchases made between Nov. 4 and Dec. 24 can be returned through Jan. 24, 2013. Best Buy requires the original receipt, gift receipt or packing slip for all returns and exchanges. A valid ID is also required.