Yes, you can enter income received from your lawn business not reported on a 1099-MISC as general income under the business income section (screenshot) This may require an upgrade of your TurboTax product.
Once you have signed
into your TurboTax Account (for TurboTax Online sign-in, click Here , then select "Take Me to My
Return"), type "Schedule C form" in the search bar then select
"jump to Schedule C form".
You will be able to claim various business expenses relate to your business income under this section. Let TurboTax guide you on entering this information.
Please
refer to this IRS link for more information about Business
Expenses
