The step-by-step procedure referenced appears to actually contain an instruction that creates the error described.
"Select Yes on the Do you have any tax withholding you haven't entered yet? screen. Enter your real estate withholding information under State Withholdings and select Done when finished."
If you enter the information here it will raise the flag described in the post. You don't appear to need to report it here as actually already reported in the California 593 for the purposes of the California return.
What potentially could impact the Federal return is the ACTUAL amount of CA tax paid/due, but that should be fed back from the CA return as a deductible to the Federal return?
