Retirement tax questions

I have a traditional IRA. The value amount is $100,000. but in previous years I did not defer 4000. This year I entered the 4000. basis and it gave me a return of 1500. but when it ask me to enter my total IRA value as of 12-31-19 I entered 96000. It takes away some of my refund. Am I doing this right or should I enter 0 as I have no more basis to report in the future?

 

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