A Simplified Employee Pension (SEP) can still be set up for 2019, and you can make contributions to it that you can deduct on your 2019 income tax return.
Business Owners Still Have Time to Set Up a SEP Plan for 2019

A Simplified Employee Pension (SEP) can still be set up for 2019, and you can make contributions to it that you can deduct on your 2019 income tax return.
When investing for retirement or other long-term goals, people usually prefer tax-advantaged accounts, but it may make more sense to hold other investments in taxable accounts.
If you own a business and don’t have a tax-advantaged retirement plan, it’s not too late to establish a Simplified Employee Pension and reduce your 2018 tax bill.