Can I take a deduction for an employer contribution to a 401K of a single member LLC?

[DawnC0]

You can take a Solo 401k tax deduction if you qualify based on the information below.  Once you are signed into your tax return, type       sep accounts     into the search bar.  Hit the enter key and then use the Jump to sep accounts link in the search results.  Answer Yes, and proceed through the interview questions.  

The business owner wears two hats in a 401(k) plan: employee and employer. Contributions can be made to the plan in both capacities. The owner can contribute both:

• Elective deferrals up to 100% of compensation (“earned income” in the case of a self-employed individual) up to the annual contribution limit:
  • $19,000 in 2019, or $25,000 in 2019 if age 50 or over ($18,500 in 2018, or $24,500 in 2018 if age 50 or over); plus
• Employer nonelective contributions up to:
  • 25% of compensation as defined by the plan, or
  • for self-employed individuals, see One-Participant 401(k) Plans (IRS)

If you’ve exceeded the limit for elective deferrals in your 401(k) plan, find out how to correct this mistake.

Total contributions to a participant’s account, not counting catch-up contributions for those age 50 and over, cannot exceed $56,000 (for 2019; $55,000 for 2018).