If you filed showing an excess of $2073, you either promised to remove the excess, or you left it alone and paid tax plus a penalty. Unless you want to actually withdraw the false excess, then you will want to amend your return.
You can amend, fix the dates of insurance and claim last month rule eligibility, which should recalculate the contribution limit as $3500. Then you would not have to withdraw any excess. And you could even contribute an additional $260 to get an additional tax deduction for 2019. (You would tell the program you deposited $560 instead of $300, then make sure to deposit the extra amount before April 15. You also have to notify the bank before making the deposit that this is a 2019 deposit, so they track it correctly.)
It would be best to mail the amended return after your first return is processed and any refund paid, but I would mail it before April 15 just to be safe. Amended returns must be mailed, they can't be e-filed, and you probably want to use a messenger service or US mail that has tracking and delivery confirmation.
