I don't understand the last part of your question. After the money was rolled from your employer to IRA's, then any rollover from the IRA to a 401(k) would be reported on a 1099-R issued by the IRA custodian. You can only roll before tax money from a Traditional IRA into a 401(k) plan.
Did you roll the IRA to a different employer? I can see not reason why you would roll a 401(k) to an IRA and then roll it back to a 401(k) with the same employer or why the employer would even allow that.
**Disclaimer: This post is for discussion purposes only and is NOT tax advice. The author takes no responsibility for the accuracy of any information in this post.**
