This Practice Note provides guidance on the procedure to be adopted to amend a matrimonial or civil partnership application, file a supplemental application or make a further application, in matrimonial or civil partnership proceedings issued on or after 6 April 2022 under the Divorce, Dissolution and Separation Act 2020 (DDSA 2020). In this context, a distinction is drawn between nullity proceedings and matrimonial and civil partnership proceedings other than nullity proceedings. For the procedure in relation to proceedings issued prior to this date, see Practice Note: Amended, supplemental and further petitions (pre-DDSA 2020). Amendments have been made to Family Procedure Rules 2010 (FPR 2010), SI 2010/2955, Pt 7 as to the procedure for applications in matrimonial and civil partnership proceedings as a consequence of DDSA 2020, and to FPR 2010, PD 7A by the Practice Direction Update No 2 of 2022. For an introduction to the wider provisions of DDSA 2020, see Practice Note: Introduction to the Divorce, Dissolution and Separation Act 2020. The