I am quoting another Champion for this answer
When you go through your business interview in TT, it will ask you about 1099-MISC income. After that it will ask you for income not reported on a 1099-MISC.
If you think about it many, many businesses do not get 1099's for their income (think of a retail store).
You do not have to enter each payment. You can just pull the total income from your bookkeeping software.
You must report all income from any source no matter whether there is a information form for it. The payors might have an obligation to file a 1099, but that is not your problem as long as you report all the income you received.