How long does it take to apply for a patent and submit an amendment?

One month after the patent amendment is submitted, the Patent Office will begin to review the amendment. If the content of the patent amendment is reasonable, it will send you a second amendment. If the contents of the patent amendment meet the requirements of the patent law and there are no mistakes, then he will not send you the second amendment (if the first amendment is submitted successfully, you will get the patent certificate in about three months).