Iu2019m not going to answer this question, and indeed doubt anyone else here on Quora will either. Thatu2019s because the rules for amending a civil complaint in federal court are complicated. The basic rules for amendments are in Rule 15. Amended and Supplemental Pleadings, but that just gets you started. Then you have to look at any local rules imposed by the relevant district (the questioner asked about New York, but there are four federal judicial districts in New York, and each has its own local rules). And then after that you have to look at any relevant rule decisions from that district, from the Second Circuit (which oversees all four New York districts) and the Supreme Court.This is a huge body of law, one that is far too large to summarize into a Quora answer. Since offering a more specific answer that fits with the questioneru2019s particular circumstances would amount to offering specific legal advice, which is prohibited on Quora to nonlawyers by laws prohibiting the unauthorized practice of law, and to lawyers by Quorau2019s terms of service, the only answer youu2019ll get, beyond my suggestion to look at FRCP Rule 15, is u201cconsult an attorneyu201d.And thus, I leave you with the direction to seek the advice of an attorney admitted to the federal courts of the specific district in which the matter is being litigated.