Anyone know what the rate is for sole proprietorships in Collingswood? I am currently dealing with the Philadelphia Business Priv Tax, and I assume it is lower across the river.

I'm not aware that New Jersey towns are even allowed to impose a business tax. This is one of the reasons property taxes are so high. The only taxes you should have to contend with are at the state level.

Here's some contact info that might help you from the collingswood.com website:

Collingswood Partners, Inc. - General Information
If you are interested in doing business in Collingswood - Call 856-858-9275 for the Collingswood Partners Office. Collingswood Partners, Inc. is a non-profit management corporation that oversees the three Business Improvement Districts in Collingswood. The Board of Directors consists of 11 members including the Manager of Collingswood Partners, a full time professional manager who handles the daily functions of the corporation. We can help you get your business started in Collingswood.