Retirement tax questions

Box 7 is checked and code is 4, death.  all amounts over 50k all come out correct and same as before.  Nothing else on 1099 is filled out box 4 is 0 on all estimates I've just been changing the box 1 gross distribution and box 2b is checked taxable amount not determined. Idk I thought something wasent right as well but I didn't change anything else. Idk because if that's the case I'd just take 35k this year and rest next year because if I don't work Sundays everyday I can cut my income by 40k. I work in a union shop mandatory 10s and 6 on Saturdays Sundays are double time and voluntary. There giving me a 25,100 deduction using 21 taxed if that means anything.