I have a beaur band saw that the drive belt came off the coged driver. I tried to replace it to the cogs but in it did not seat. Is there procedure to replace it???

Bauer brand Band Saws are sold by Harbor Freight, not Home Depot. Harbor Freight has a pretty liberal warranty and return policy typically, especially if you paid for the extended warranty. They would probably just swap it out if it failed. Their website also has an instruction manual you can download and troubleshoot with.

If you bought it at Home Depot you can go to the tool rental area and I believe they can help you.