Agree that file 5500 for each solo 401k, but what about:
From Form 5500-EZ instructions:
"You do not have to file Form 5500-EZ for the 2019 plan year for a one-participant plan if the total of the plan's assets and the assets of all other one-participant plans maintained by the employer at the end of the 2019 plan year does not exceed $250,000, unless 2019 is the final plan year of the plan."
I'm pretty sure this is talking about if I had 2+ solo 401ks (say I had 2+ totally different businesses), but just making sure "other one-participant plans" can't mean IRAs. (Though now I am pretty sure it doesn't apply to my 9 to 5 401k since that 401k plan is maintained by that employer, not me, and it's not a one-partcipant 401k, but a normal company-wide type one.)
