I changed the form of my one person company from an S-Corp to a sole proprietorship. The IRS issued me a new Employer ID Number (EIN). I forgot about the fact that I had pension plans which were registered to the old number.
Is it okay to leave them as is? Do I have to change the number on the pension plans too? If I leave them as is, can I continue to contribute to them or do I need to establish a new plan?
I appreciate any advice.
Thank you.