If you would like to open a SEP IRA, Guideline requires you to fill out the IRS form 5305 to establish eligibility rules. Once that is complete, you can open and fund your account in minutes by going to www.guideline.com/sep.
Form 5305 does not need to be provided to Guideline, but you should keep a copy of it for your records and it should be shared with any employees you might add to your plan.
Consult your tax advisor if you have questions about how to answer the eligibility questions.
The IRS website has the full rules for establishing a SEP IRA:
Make sure you consult your tax advisor if you have any questions about your eligible income.