Both the custodial parent and noncustodial parent in a support action are permitted to request that the support order amount be changed whenever there is a change in circumstances of either party. However, six months must have passed since the date of the last support order, or the moving party must ask for the permission of the judge before proceeding. See Local Rule L 1910.19.
An order of support is changed or modified by filing a petition for modification. Parties can do this online at Pennsylvania Department of Human Services, by coming to the Domestic Relations Section in person or requesting a petition be sent by mail. Mail requests must be signed and notarized.