Employer Contribution individual 401k

[MReinhard]

Which line is the employer contribution on the Keogh, SEP and SIMPLE Contribution

[dmertz]

Line 6e of Part I is where you enter the employer contribution if you are not using the Maximize function.

If you are using the Maximize function, your employer contribution would be the amount on line 21 of Part III minus your regular elective and catch-up contributions.  You generally allocate the net earnings first to elective deferrals and catch-up contributions, then to employer contributions, but it's possible do a different mix as long as the employer contribution does not exceed the amount on Part III line 13 and the regular and catch-up elective deferrals do not exceed the permissible maximums.

[BillM223]

I am not sure what you are asking, but the instructions for Schedule C line 19 (page 😎 state:

If the plan included you as a self-employed person, enter the contributions made as an employer on your behalf on Schedule 1 (Form 1040), line 16, not on Schedule C

If this is not a self-employed situation or if you are asking on what forms this employer contribution appears, please come back and give us a lot more context to your question.