The problem is a bug within their withdrawal function, that causes a failure when you enter data into the "Payment ID" field, which I always do in every application I use, so I can track everything. I'm in the US, and I figure the IRS is going to come knocking one day, so I'm going to be prepared with documentation and notes on everything just in case.

THANK YOU to SlowGrowth and the ITNS team for putting some pressure on stocks.exchange to troubleshoot and identify the problem. Now they are working to fix their code.

Thanks everyone. Problem solved!

-SypsG