I sold funds within a SEP IRA and deposited to another SEP IRA with a different institution, I received a 2018 1099-B is this reportable income

[dmertz · Accepted solution]

Are you sure it's a Form 1099-B and not a Form 1099-R?

Assuming it's really a Form 1099-B, the Form 1099-B suggests that you received an in-kind distribution from the original SEP-IRA, sold the shares outside the SEP-IRA, then rolled over the cash to a different SEP-IRA.  This is not permitted.  Under the circumstances distribution from the original SEP-IRA is taxable and ineligible for rollover.  The cash deposited into the new SEP-IRA constitutes an excess contribution to the extent that it exceeds the amount that you are eligible to contribute as a new traditional IRA contribution.

The transaction that you did is only permissible if the in-kind distribution was from a qualified retirement plan like a 401(k), 403(b) or 457(b).

If the shares were actually sold inside the SEP-IRA, you should not have received a Form 1099-B.