fill in both boxes
code A is for the regular method and code C is for the non-farm optional method. Turbotax will optimize.
most don't qualify for the NFO
Nonfarm Optional Method. You may use this method only if (a) your net nonfarm profits were less than $6,540 and also less than 72.189% of your gross nonfarm income, and (b) you had net earnings from self-employment of at least $400 in 2 of the prior 3 years. Caution: You may use this method no more than five times.
