Can I amend a 2022 1040 form now to add a W2? I received a message in Turbo Tax stating the IRS hasn't gotten the amend section ready yet.

I loaded the 2022 version of Turbo Tax and then brought in the original 2022 return that was previously filed. Help info we found said the return amount should be 0 and you should only update what needs to be amended. However, we saw the refund amount. We continued to the Federal section to add the W2 and it increased the amount of the refund, but it looks like this is the total of what the full refund should have been, not the additional amount over what was already refunded.  Did I do something wrong that it causing me not to be able to complete the amendment?  What do I need to do at this point?