5329 is the penalty form used to calculate penalties on excess contributions or early withdrawals from IRAs, other retirement plans, health savings accounts, and a few other things. The -T means "taxpayer". (If you are filing married filing jointly, -T means the first named taxpayer and -S means spouse.)
Do you have a situation involving penalties for excess contribution or early withdrawal? Did you have such a situation last year that might require carryover to this year?
