Can you provide some more details on what you are trying to exclude from tax and on what form or for what state?
Transamerica Life Insurance Co. for North Carolina tax return
Yes, here is a summary of retirement plans not taxed in NC.
If the retiree had five or more years of service as of August 12, 1989, the following retirement plans are excluded from NC tax:
In addition, Social Security and Railroad retirement is not taxed in NC.
Some military retirement is excluded: