The Postal Service text scam is just one of the many being sent to potential victims. Therefore, recipients are asked not to click the links in the fake text messages. This is because the links go to fake and phishing USPS websites which steal account credentials, personal, and financial information.
The Postal Service Text Scam

[USP] - Your package failed to deliver due to incorrect address, please update your address information online. hxxps://ldwlus-p.net
The link in the text goes to the following fake USP website:

The fake website steals account personal and financial information, which will be used fraudulently. Therefore, if you were tricked by the scam text, please contact your bank for help if you have given out your financial information.
If you have received the "Postal Service" text scam, please share it in a comment. Include the telephone number the text came from. This will help inform others, which will prevent them from becoming victims.