@InNewJersey
Taxable income is on NJ-1040 line 38. If line 38 is blank, you have income, but you do not have any taxable income.
From what you wrote it's not clear whether you have anything on line 29. If line 29 is $10,000 or less if you are filing as single or married filing separately, or $20,000 or less if you are filing as married filing jointly, head of household, or qualified widow(er), you are not even required to file a New Jersey tax return.
Is most of your income retirement income? If so, the exclusion on line 28c may have eliminated most or all of your income. The retirement income exclusions are very generous. If line 29 is blank or zero, the rest of the lines are supposed to be blank or zero. No one will question it. It's very common for people who are retired. No numbers are missing, and there is nothing that needs to be fixed.
