I received several 1099-MISC and reported this income on line 1 of Schedule C plus a bit more for which I did not receive any 1099-MISC.
Now I'm getting a letter from the IRS proposing to change my return and add in all the 1099-MISC income as being unreported.
How is the IRS supposed to match up my Schedule C line 1 with the 1099-MISC I received? In turbo tax, there is line 1a and line 1b to segregate the line 1 income between 1099 reported on line 1b and unreported on line 1a, however, that line is not broken out on schedule C. When I filled out my return in Turbo Tax, I put all the income under 1a since it seemed to make no difference. I tried to move it to 1b and amend with 1040X but that resulted in no change to my return. Did the line 1a vs 1b show up somewhere that the IRS picked up on?