Ok... here are some close guesses on Nissan tax credit tally from these URLs:
https://insideevs.com/features/337511/november-update-4-automakers-closest-to-losing-federal-tax-credit/ - 126,875 - hope this is right and hope it includes Nov 2018.
https://usa.nissannews.com/en-US/releases/release-ff38a0c7224a41cdae89d786a02fbd82-nissan-group-reports-december-2018-and-2018-calendar-year-u-s-sales - 1,667 for Dec 2018
https://insideevs.com/news/343998/monthly-plug-in-ev-sales-scorecard/ and https://usa.nissannews.com/en-US/releases/release-103b1d052fdcd89776fbcfb58d00a83f-nissan-group-reports-december-2019-and-2019-calendar-year-us-sales - 12,365 for 2019
https://usa.nissannews.com/en-US/releases/release-6421e197e79460fc32ead4abcf00237f-nissan-group-reports-second-quarter-2020-us-sales - 3,007 for Jan to Jun 2020
That adds up to 143,914.
If someone has a chance, maybe double check my number or add up year end sales from previous IEVs or Nissan official reports?