Greetings, cricketmitchell.
Currently, the following retirement plans are supported in QuickBooks Online: SARSEP, 401(k), SIMPLE 401(k), 403(b), SIMPLE IRA, Roth 401(k), Roth 403(b).
One option you have is to speak with your accountant about another possible way of recording SEP. They'll be able to tell you what's the best course of action for this specific type of transaction, where to enter the contributions to get them to report to the correct line, and what amount to report.
If you need additional information about the retirement plan deductions and contributions, as well as how to set them up, assign and remove them: Retirement plan in Online Payroll.
Meanwhile, you can visit our blog site to know the latest update for the month of November. I've also added a second link for tips and articles of your future payroll tasks:
I'm just a post away if you should have any questions. Have a great weekend.