When you enter your 1099 information, it will automatically flow to Form 1040. Form 1040 has all your different income and deductions so once you enter all your 1099 forms, it will automatically flow to Form 1040.
There is no specific place to enter information on form 1040 since Form 1040 takes information from other forms like Form 1099 and will automatically place it on Form 1040.
