40+ Sink P Trap Offset. If these nuts won't budge, or if they. While these make for easy connection when the tailpiece is offset.
If the leak is occurring at one of the joints between pipes, try tightening the slip nuts.
If that doesn't work, loosen and remove the entire trap. This applies to most types of sinks with a ptrap. After installing a new bathroom sink, the drain tailpiece doesn't line up with the trap coming out of the wall. The seal prevents noxious air or gases to backflow from the sewer line, but the original waste can still exit into the sewage system.