The processing time for adjustments of status based on a citizen's immediate petition will always depend on different factors, such as USCIS workload and the complexity of the specific case.

Form I-130 (Petition for Immediate Relative):

Processing Time Generally, the Form I-130 processing time for spouses, parents and unmarried children under the age of 21 of US citizens is currently taking between 10-14 months​.

Form I-485 (Application for Adjustment of Status):

Processing time of Form I-485 can vary between 8 to 18 months. This may depend on the USCIS office handling the case.

Factors Influencing Processing Time:

• Case Complexity: Cases with complicated backgrounds or that require additional documentation may take longer.
• USCIS Office: Some local offices may have faster or slower processing times depending on their workload.
• Adjustment of Status Interview: In some cases, an interview may be required, which can add additional time to the process.

It is advisable to check current processing times on the USCIS website, as they may vary and be updated frequently. Furthermore, in case of doubts or specific situations, it is advisable to consult with an immigration lawyer.