If I already got my federal and state refunds and received a corrected 1099 after that that shows my state withholding to calif different than the one i FILED

My Ca. withholding was $335.00 less than claimed at the time of filing.

If the IRS accepts your return, then you have to wait until it has been fully processed and you have received your refund.  THEN you can prepare an amended tax return 1040X and mail it in. You cannot e-file an amended return.  Meanwhile, DO NOT change anything on your return until you start the amended return.


https://ttlc.intuit.com/questions/1894381-how-to-amend-change-or-correct-a-return-you-already-filed 

If the IRS accepts your return, then you have to wait until it has been fully processed and you have received your refund.  THEN you can prepare an amended tax return 1040X and mail it in. You cannot e-file an amended return.  Meanwhile, DO NOT change anything on your return until you start the amended return.


https://ttlc.intuit.com/questions/1894381-how-to-amend-change-or-correct-a-return-you-already-filed