I am wondering how come my Social Security Income - Taxable verses Nontaxable is so drastically different from last year to this year.
2018: Taxable = 12,279 & NON-taxable = 11,805
2019: Taxable = 21,237 & NON-taxable = 3,748
That depends on your other income. Anywhere from 0-85% can be taxable. That is calculated on the "Social Security Benefits Worksheet". Print all form and worksheets and compare that worksheet for both years and you shiuld see your answer.