Once a return has been filed and accepted for processing by the IRS or state you should do NOTHING but wait for the original returns to be processed ... and this year processing may happen in multiple steps meaning you may get the original refund first and then the balance after the changes later. AND if this changes the amount of third stimulus payment you are entitled to then that difference will come in yet another payment. Patience will be needed until the IRS can process the millions of returns stuck in the system due to lack of resources and personnel.
Only when the IRS/state is fully finished should you attempt to amend any return if one is still needed. The late tax law changes which affected the Unemployment and PTC will be automatically applied to your filed return if you go to open the return so you need to open the return BEFORE starting the amendment process so that you can check and see if your return looks like what was changed as those figures must be entered on the Column A of the form 1040X. This will not be easy to do for many folks like in the past and seeking professional assistance may be needed this year ... thanks to the fools in congress for messing up the tax filing system yet again.
